648684920

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{40241}}^1$

素因数の和:40296

約数の個数: 64

約数和(自身を含む): 1622557440

約数和(自身を除く): 973872520

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, 620, 806, 1240, 1612, 2015, 3224, 4030, 8060, 16120, 40241, 80482, 160964, 201205, 321928, 402410, 523133, 804820, 1046266, 1247471, 1609640, 2092532, 2494942, 2615665, 4185064, 4989884, 5231330, 6237355, 9979768, 10462660, 12474710, 16217123, 20925320, 24949420, 32434246, 49898840, 64868492, 81085615, 129736984, 162171230, 324342460, 648684920]

約数ペア:

[(1, 648684920), (2, 324342460), (4, 162171230), (5, 129736984), (8, 81085615), (10, 64868492), (13, 49898840), (20, 32434246), (26, 24949420), (31, 20925320), (40, 16217123), (52, 12474710), (62, 10462660), (65, 9979768), (104, 6237355), (124, 5231330), (130, 4989884), (155, 4185064), (248, 2615665), (260, 2494942), (310, 2092532), (403, 1609640), (520, 1247471), (620, 1046266), (806, 804820), (1240, 523133), (1612, 402410), (2015, 321928), (3224, 201205), (4030, 160964), (8060, 80482), (16120, 40241)]