81258440

素因数分解:

$2^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{3449}}^1$

素因数の和:3510

約数の個数: 64

約数和(自身を含む): 198720000

約数和(自身を除く): 117461560

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 31, 38, 40, 62, 76, 95, 124, 152, 155, 190, 248, 310, 380, 589, 620, 760, 1178, 1240, 2356, 2945, 3449, 4712, 5890, 6898, 11780, 13796, 17245, 23560, 27592, 34490, 65531, 68980, 106919, 131062, 137960, 213838, 262124, 327655, 427676, 524248, 534595, 655310, 855352, 1069190, 1310620, 2031461, 2138380, 2621240, 4062922, 4276760, 8125844, 10157305, 16251688, 20314610, 40629220, 81258440]

約数ペア:

[(1, 81258440), (2, 40629220), (4, 20314610), (5, 16251688), (8, 10157305), (10, 8125844), (19, 4276760), (20, 4062922), (31, 2621240), (38, 2138380), (40, 2031461), (62, 1310620), (76, 1069190), (95, 855352), (124, 655310), (152, 534595), (155, 524248), (190, 427676), (248, 327655), (310, 262124), (380, 213838), (589, 137960), (620, 131062), (760, 106919), (1178, 68980), (1240, 65531), (2356, 34490), (2945, 27592), (3449, 23560), (4712, 17245), (5890, 13796), (6898, 11780)]