390996880

素因数分解:

$2^4\times 5^1\times {\mathrm{269}}^1\times {\mathrm{18169}}^1$

素因数の和:18451

約数の個数: 40

約数和(自身を含む): 912497400

約数和(自身を除く): 521500520

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 269, 538, 1076, 1345, 2152, 2690, 4304, 5380, 10760, 18169, 21520, 36338, 72676, 90845, 145352, 181690, 290704, 363380, 726760, 1453520, 4887461, 9774922, 19549844, 24437305, 39099688, 48874610, 78199376, 97749220, 195498440, 390996880]

約数ペア:

[(1, 390996880), (2, 195498440), (4, 97749220), (5, 78199376), (8, 48874610), (10, 39099688), (16, 24437305), (20, 19549844), (40, 9774922), (80, 4887461), (269, 1453520), (538, 726760), (1076, 363380), (1345, 290704), (2152, 181690), (2690, 145352), (4304, 90845), (5380, 72676), (10760, 36338), (18169, 21520)]