128456560

素因数分解:

$2^4\times 5^1\times {\mathrm{31}}^1\times {\mathrm{51797}}^1$

素因数の和:51841

約数の個数: 40

約数和(自身を含む): 308301696

約数和(自身を除く): 179845136

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 40, 62, 80, 124, 155, 248, 310, 496, 620, 1240, 2480, 51797, 103594, 207188, 258985, 414376, 517970, 828752, 1035940, 1605707, 2071880, 3211414, 4143760, 6422828, 8028535, 12845656, 16057070, 25691312, 32114140, 64228280, 128456560]

約数ペア:

[(1, 128456560), (2, 64228280), (4, 32114140), (5, 25691312), (8, 16057070), (10, 12845656), (16, 8028535), (20, 6422828), (31, 4143760), (40, 3211414), (62, 2071880), (80, 1605707), (124, 1035940), (155, 828752), (248, 517970), (310, 414376), (496, 258985), (620, 207188), (1240, 103594), (2480, 51797)]