21988890

素因数分解:

$2^1\times 3^2\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{167}}^1$

素因数の和:217

約数の個数: 192

約数和(自身を含む): 75479040

約数和(自身を除く): 53490150

約数列:

[1, 2, 3, 5, 6, 7, 9, 10, 11, 14, 15, 18, 19, 21, 22, 30, 33, 35, 38, 42, 45, 55, 57, 63, 66, 70, 77, 90, 95, 99, 105, 110, 114, 126, 133, 154, 165, 167, 171, 190, 198, 209, 210, 231, 266, 285, 315, 330, 334, 342, 385, 399, 418, 462, 495, 501, 570, 627, 630, 665, 693, 770, 798, 835, 855, 990, 1002, 1045, 1155, 1169, 1197, 1254, 1330, 1386, 1463, 1503, 1670, 1710, 1837, 1881, 1995, 2090, 2310, 2338, 2394, 2505, 2926, 3006, 3135, 3173, 3465, 3507, 3674, 3762, 3990, 4389, 5010, 5511, 5845, 5985, 6270, 6346, 6930, 7014, 7315, 7515, 8778, 9185, 9405, 9519, 10521, 11022, 11690, 11970, 12859, 13167, 14630, 15030, 15865, 16533, 17535, 18370, 18810, 19038, 21042, 21945, 22211, 25718, 26334, 27555, 28557, 31730, 33066, 34903, 35070, 38577, 43890, 44422, 47595, 52605, 55110, 57114, 64295, 65835, 66633, 69806, 77154, 82665, 95190, 104709, 105210, 111055, 115731, 128590, 131670, 133266, 142785, 165330, 174515, 192885, 199899, 209418, 222110, 231462, 244321, 285570, 314127, 333165, 349030, 385770, 399798, 488642, 523545, 578655, 628254, 666330, 732963, 999495, 1047090, 1157310, 1221605, 1465926, 1570635, 1998990, 2198889, 2443210, 3141270, 3664815, 4397778, 7329630, 10994445, 21988890]

約数ペア:

[(1, 21988890), (2, 10994445), (3, 7329630), (5, 4397778), (6, 3664815), (7, 3141270), (9, 2443210), (10, 2198889), (11, 1998990), (14, 1570635), (15, 1465926), (18, 1221605), (19, 1157310), (21, 1047090), (22, 999495), (30, 732963), (33, 666330), (35, 628254), (38, 578655), (42, 523545), (45, 488642), (55, 399798), (57, 385770), (63, 349030), (66, 333165), (70, 314127), (77, 285570), (90, 244321), (95, 231462), (99, 222110), (105, 209418), (110, 199899), (114, 192885), (126, 174515), (133, 165330), (154, 142785), (165, 133266), (167, 131670), (171, 128590), (190, 115731), (198, 111055), (209, 105210), (210, 104709), (231, 95190), (266, 82665), (285, 77154), (315, 69806), (330, 66633), (334, 65835), (342, 64295), (385, 57114), (399, 55110), (418, 52605), (462, 47595), (495, 44422), (501, 43890), (570, 38577), (627, 35070), (630, 34903), (665, 33066), (693, 31730), (770, 28557), (798, 27555), (835, 26334), (855, 25718), (990, 22211), (1002, 21945), (1045, 21042), (1155, 19038), (1169, 18810), (1197, 18370), (1254, 17535), (1330, 16533), (1386, 15865), (1463, 15030), (1503, 14630), (1670, 13167), (1710, 12859), (1837, 11970), (1881, 11690), (1995, 11022), (2090, 10521), (2310, 9519), (2338, 9405), (2394, 9185), (2505, 8778), (2926, 7515), (3006, 7315), (3135, 7014), (3173, 6930), (3465, 6346), (3507, 6270), (3674, 5985), (3762, 5845), (3990, 5511), (4389, 5010)]