21001992

素因数分解:

$2^3\times 3^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{53}}^1\times {\mathrm{79}}^1$

素因数の和:171

約数の個数: 128

約数和(自身を含む): 62208000

約数和(自身を除く): 41206008

約数列:

[1, 2, 3, 4, 6, 8, 11, 12, 19, 22, 24, 33, 38, 44, 53, 57, 66, 76, 79, 88, 106, 114, 132, 152, 158, 159, 209, 212, 228, 237, 264, 316, 318, 418, 424, 456, 474, 583, 627, 632, 636, 836, 869, 948, 1007, 1166, 1254, 1272, 1501, 1672, 1738, 1749, 1896, 2014, 2332, 2508, 2607, 3002, 3021, 3476, 3498, 4028, 4187, 4503, 4664, 5016, 5214, 6004, 6042, 6952, 6996, 8056, 8374, 9006, 10428, 11077, 12008, 12084, 12561, 13992, 16511, 16748, 18012, 20856, 22154, 24168, 25122, 33022, 33231, 33496, 36024, 44308, 46057, 49533, 50244, 66044, 66462, 79553, 88616, 92114, 99066, 100488, 132088, 132924, 138171, 159106, 184228, 198132, 238659, 265848, 276342, 318212, 368456, 396264, 477318, 552684, 636424, 875083, 954636, 1105368, 1750166, 1909272, 2625249, 3500332, 5250498, 7000664, 10500996, 21001992]

約数ペア:

[(1, 21001992), (2, 10500996), (3, 7000664), (4, 5250498), (6, 3500332), (8, 2625249), (11, 1909272), (12, 1750166), (19, 1105368), (22, 954636), (24, 875083), (33, 636424), (38, 552684), (44, 477318), (53, 396264), (57, 368456), (66, 318212), (76, 276342), (79, 265848), (88, 238659), (106, 198132), (114, 184228), (132, 159106), (152, 138171), (158, 132924), (159, 132088), (209, 100488), (212, 99066), (228, 92114), (237, 88616), (264, 79553), (316, 66462), (318, 66044), (418, 50244), (424, 49533), (456, 46057), (474, 44308), (583, 36024), (627, 33496), (632, 33231), (636, 33022), (836, 25122), (869, 24168), (948, 22154), (1007, 20856), (1166, 18012), (1254, 16748), (1272, 16511), (1501, 13992), (1672, 12561), (1738, 12084), (1749, 12008), (1896, 11077), (2014, 10428), (2332, 9006), (2508, 8374), (2607, 8056), (3002, 6996), (3021, 6952), (3476, 6042), (3498, 6004), (4028, 5214), (4187, 5016), (4503, 4664)]