20719160

素因数分解:

$2^3\times 5^1\times 7^2\times {\mathrm{11}}^1\times {\mathrm{31}}^2$

素因数の和:98

約数の個数: 144

約数和(自身を含む): 61129080

約数和(自身を除く): 40409920

約数列:

[1, 2, 4, 5, 7, 8, 10, 11, 14, 20, 22, 28, 31, 35, 40, 44, 49, 55, 56, 62, 70, 77, 88, 98, 110, 124, 140, 154, 155, 196, 217, 220, 245, 248, 280, 308, 310, 341, 385, 392, 434, 440, 490, 539, 616, 620, 682, 770, 868, 961, 980, 1078, 1085, 1240, 1364, 1519, 1540, 1705, 1736, 1922, 1960, 2156, 2170, 2387, 2695, 2728, 3038, 3080, 3410, 3844, 4312, 4340, 4774, 4805, 5390, 6076, 6727, 6820, 7595, 7688, 8680, 9548, 9610, 10571, 10780, 11935, 12152, 13454, 13640, 15190, 16709, 19096, 19220, 21142, 21560, 23870, 26908, 30380, 33418, 33635, 38440, 42284, 47089, 47740, 52855, 53816, 60760, 66836, 67270, 73997, 83545, 84568, 94178, 95480, 105710, 133672, 134540, 147994, 167090, 188356, 211420, 235445, 269080, 295988, 334180, 369985, 376712, 422840, 470890, 517979, 591976, 668360, 739970, 941780, 1035958, 1479940, 1883560, 2071916, 2589895, 2959880, 4143832, 5179790, 10359580, 20719160]

約数ペア:

[(1, 20719160), (2, 10359580), (4, 5179790), (5, 4143832), (7, 2959880), (8, 2589895), (10, 2071916), (11, 1883560), (14, 1479940), (20, 1035958), (22, 941780), (28, 739970), (31, 668360), (35, 591976), (40, 517979), (44, 470890), (49, 422840), (55, 376712), (56, 369985), (62, 334180), (70, 295988), (77, 269080), (88, 235445), (98, 211420), (110, 188356), (124, 167090), (140, 147994), (154, 134540), (155, 133672), (196, 105710), (217, 95480), (220, 94178), (245, 84568), (248, 83545), (280, 73997), (308, 67270), (310, 66836), (341, 60760), (385, 53816), (392, 52855), (434, 47740), (440, 47089), (490, 42284), (539, 38440), (616, 33635), (620, 33418), (682, 30380), (770, 26908), (868, 23870), (961, 21560), (980, 21142), (1078, 19220), (1085, 19096), (1240, 16709), (1364, 15190), (1519, 13640), (1540, 13454), (1705, 12152), (1736, 11935), (1922, 10780), (1960, 10571), (2156, 9610), (2170, 9548), (2387, 8680), (2695, 7688), (2728, 7595), (3038, 6820), (3080, 6727), (3410, 6076), (3844, 5390), (4312, 4805), (4340, 4774)]