7981520

素因数分解:

$2^4\times 5^1\times {\mathrm{19}}^1\times {\mathrm{59}}^1\times {\mathrm{89}}^1$

素因数の和:180

約数の個数: 80

約数和(自身を含む): 20088000

約数和(自身を除く): 12106480

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 38, 40, 59, 76, 80, 89, 95, 118, 152, 178, 190, 236, 295, 304, 356, 380, 445, 472, 590, 712, 760, 890, 944, 1121, 1180, 1424, 1520, 1691, 1780, 2242, 2360, 3382, 3560, 4484, 4720, 5251, 5605, 6764, 7120, 8455, 8968, 10502, 11210, 13528, 16910, 17936, 21004, 22420, 26255, 27056, 33820, 42008, 44840, 52510, 67640, 84016, 89680, 99769, 105020, 135280, 199538, 210040, 399076, 420080, 498845, 798152, 997690, 1596304, 1995380, 3990760, 7981520]

約数ペア:

[(1, 7981520), (2, 3990760), (4, 1995380), (5, 1596304), (8, 997690), (10, 798152), (16, 498845), (19, 420080), (20, 399076), (38, 210040), (40, 199538), (59, 135280), (76, 105020), (80, 99769), (89, 89680), (95, 84016), (118, 67640), (152, 52510), (178, 44840), (190, 42008), (236, 33820), (295, 27056), (304, 26255), (356, 22420), (380, 21004), (445, 17936), (472, 16910), (590, 13528), (712, 11210), (760, 10502), (890, 8968), (944, 8455), (1121, 7120), (1180, 6764), (1424, 5605), (1520, 5251), (1691, 4720), (1780, 4484), (2242, 3560), (2360, 3382)]