64879280

素因数分解:

$2^4\times 5^1\times {\mathrm{31}}^1\times {\mathrm{26161}}^1$

素因数の和:26205

約数の個数: 40

約数和(自身を含む): 155716224

約数和(自身を除く): 90836944

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 40, 62, 80, 124, 155, 248, 310, 496, 620, 1240, 2480, 26161, 52322, 104644, 130805, 209288, 261610, 418576, 523220, 810991, 1046440, 1621982, 2092880, 3243964, 4054955, 6487928, 8109910, 12975856, 16219820, 32439640, 64879280]

約数ペア:

[(1, 64879280), (2, 32439640), (4, 16219820), (5, 12975856), (8, 8109910), (10, 6487928), (16, 4054955), (20, 3243964), (31, 2092880), (40, 1621982), (62, 1046440), (80, 810991), (124, 523220), (155, 418576), (248, 261610), (310, 209288), (496, 130805), (620, 104644), (1240, 52322), (2480, 26161)]