161519920

素因数分解:

$2^4\times 5^1\times {\mathrm{31}}^1\times {\mathrm{65129}}^1$

素因数の和:65173

約数の個数: 40

約数和(自身を含む): 387653760

約数和(自身を除く): 226133840

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 40, 62, 80, 124, 155, 248, 310, 496, 620, 1240, 2480, 65129, 130258, 260516, 325645, 521032, 651290, 1042064, 1302580, 2018999, 2605160, 4037998, 5210320, 8075996, 10094995, 16151992, 20189990, 32303984, 40379980, 80759960, 161519920]

約数ペア:

[(1, 161519920), (2, 80759960), (4, 40379980), (5, 32303984), (8, 20189990), (10, 16151992), (16, 10094995), (20, 8075996), (31, 5210320), (40, 4037998), (62, 2605160), (80, 2018999), (124, 1302580), (155, 1042064), (248, 651290), (310, 521032), (496, 325645), (620, 260516), (1240, 130258), (2480, 65129)]