256885840

素因数分解:

$2^4\times 5^1\times {\mathrm{31}}^1\times {\mathrm{103583}}^1$

素因数の和:103627

約数の個数: 40

約数和(自身を含む): 616531968

約数和(自身を除く): 359646128

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 40, 62, 80, 124, 155, 248, 310, 496, 620, 1240, 2480, 103583, 207166, 414332, 517915, 828664, 1035830, 1657328, 2071660, 3211073, 4143320, 6422146, 8286640, 12844292, 16055365, 25688584, 32110730, 51377168, 64221460, 128442920, 256885840]

約数ペア:

[(1, 256885840), (2, 128442920), (4, 64221460), (5, 51377168), (8, 32110730), (10, 25688584), (16, 16055365), (20, 12844292), (31, 8286640), (40, 6422146), (62, 4143320), (80, 3211073), (124, 2071660), (155, 1657328), (248, 1035830), (310, 828664), (496, 517915), (620, 414332), (1240, 207166), (2480, 103583)]