8978840

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{557}}^1$

素因数の和:612

約数の個数: 64

約数和(自身を含む): 22498560

約数和(自身を除く): 13519720

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 31, 40, 52, 62, 65, 104, 124, 130, 155, 248, 260, 310, 403, 520, 557, 620, 806, 1114, 1240, 1612, 2015, 2228, 2785, 3224, 4030, 4456, 5570, 7241, 8060, 11140, 14482, 16120, 17267, 22280, 28964, 34534, 36205, 57928, 69068, 72410, 86335, 138136, 144820, 172670, 224471, 289640, 345340, 448942, 690680, 897884, 1122355, 1795768, 2244710, 4489420, 8978840]

約数ペア:

[(1, 8978840), (2, 4489420), (4, 2244710), (5, 1795768), (8, 1122355), (10, 897884), (13, 690680), (20, 448942), (26, 345340), (31, 289640), (40, 224471), (52, 172670), (62, 144820), (65, 138136), (104, 86335), (124, 72410), (130, 69068), (155, 57928), (248, 36205), (260, 34534), (310, 28964), (403, 22280), (520, 17267), (557, 16120), (620, 14482), (806, 11140), (1114, 8060), (1240, 7241), (1612, 5570), (2015, 4456), (2228, 4030), (2785, 3224)]