256848640

素因数分解:

$2^8\times 5^1\times {\mathrm{31}}^1\times {\mathrm{6473}}^1$

素因数の和:6525

約数の個数: 72

約数和(自身を含む): 635177088

約数和(自身を除く): 378328448

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 32, 40, 62, 64, 80, 124, 128, 155, 160, 248, 256, 310, 320, 496, 620, 640, 992, 1240, 1280, 1984, 2480, 3968, 4960, 6473, 7936, 9920, 12946, 19840, 25892, 32365, 39680, 51784, 64730, 103568, 129460, 200663, 207136, 258920, 401326, 414272, 517840, 802652, 828544, 1003315, 1035680, 1605304, 1657088, 2006630, 2071360, 3210608, 4013260, 4142720, 6421216, 8026520, 8285440, 12842432, 16053040, 25684864, 32106080, 51369728, 64212160, 128424320, 256848640]

約数ペア:

[(1, 256848640), (2, 128424320), (4, 64212160), (5, 51369728), (8, 32106080), (10, 25684864), (16, 16053040), (20, 12842432), (31, 8285440), (32, 8026520), (40, 6421216), (62, 4142720), (64, 4013260), (80, 3210608), (124, 2071360), (128, 2006630), (155, 1657088), (160, 1605304), (248, 1035680), (256, 1003315), (310, 828544), (320, 802652), (496, 517840), (620, 414272), (640, 401326), (992, 258920), (1240, 207136), (1280, 200663), (1984, 129460), (2480, 103568), (3968, 64730), (4960, 51784), (6473, 39680), (7936, 32365), (9920, 25892), (12946, 19840)]