258987640

素因数分解:

$2^3\times 5^1\times {\mathrm{31}}^1\times {\mathrm{331}}^1\times {\mathrm{631}}^1$

素因数の和:1004

約数の個数: 64

約数和(自身を含む): 604293120

約数和(自身を除く): 345305480

約数列:

[1, 2, 4, 5, 8, 10, 20, 31, 40, 62, 124, 155, 248, 310, 331, 620, 631, 662, 1240, 1262, 1324, 1655, 2524, 2648, 3155, 3310, 5048, 6310, 6620, 10261, 12620, 13240, 19561, 20522, 25240, 39122, 41044, 51305, 78244, 82088, 97805, 102610, 156488, 195610, 205220, 208861, 391220, 410440, 417722, 782440, 835444, 1044305, 1670888, 2088610, 4177220, 6474691, 8354440, 12949382, 25898764, 32373455, 51797528, 64746910, 129493820, 258987640]

約数ペア:

[(1, 258987640), (2, 129493820), (4, 64746910), (5, 51797528), (8, 32373455), (10, 25898764), (20, 12949382), (31, 8354440), (40, 6474691), (62, 4177220), (124, 2088610), (155, 1670888), (248, 1044305), (310, 835444), (331, 782440), (620, 417722), (631, 410440), (662, 391220), (1240, 208861), (1262, 205220), (1324, 195610), (1655, 156488), (2524, 102610), (2648, 97805), (3155, 82088), (3310, 78244), (5048, 51305), (6310, 41044), (6620, 39122), (10261, 25240), (12620, 20522), (13240, 19561)]