8139940

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{89}}^1\times {\mathrm{269}}^1$

素因数の和:384

約数の個数: 48

約数和(自身を含む): 18370800

約数和(自身を除く): 10230860

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 68, 85, 89, 170, 178, 269, 340, 356, 445, 538, 890, 1076, 1345, 1513, 1780, 2690, 3026, 4573, 5380, 6052, 7565, 9146, 15130, 18292, 22865, 23941, 30260, 45730, 47882, 91460, 95764, 119705, 239410, 406997, 478820, 813994, 1627988, 2034985, 4069970, 8139940]

約数ペア:

[(1, 8139940), (2, 4069970), (4, 2034985), (5, 1627988), (10, 813994), (17, 478820), (20, 406997), (34, 239410), (68, 119705), (85, 95764), (89, 91460), (170, 47882), (178, 45730), (269, 30260), (340, 23941), (356, 22865), (445, 18292), (538, 15130), (890, 9146), (1076, 7565), (1345, 6052), (1513, 5380), (1780, 4573), (2690, 3026)]