18919960

素因数分解:

$2^3\times 5^1\times {\mathrm{331}}^1\times {\mathrm{1429}}^1$

素因数の和:1771

約数の個数: 32

約数和(自身を含む): 42728400

約数和(自身を除く): 23808440

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 331, 662, 1324, 1429, 1655, 2648, 2858, 3310, 5716, 6620, 7145, 11432, 13240, 14290, 28580, 57160, 472999, 945998, 1891996, 2364995, 3783992, 4729990, 9459980, 18919960]

約数ペア:

[(1, 18919960), (2, 9459980), (4, 4729990), (5, 3783992), (8, 2364995), (10, 1891996), (20, 945998), (40, 472999), (331, 57160), (662, 28580), (1324, 14290), (1429, 13240), (1655, 11432), (2648, 7145), (2858, 6620), (3310, 5716)]