20218720

素因数分解:

$2^5\times 5^1\times {\mathrm{107}}^1\times {\mathrm{1181}}^1$

素因数の和:1303

約数の個数: 48

約数和(自身を含む): 48253968

約数和(自身を除く): 28035248

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 107, 160, 214, 428, 535, 856, 1070, 1181, 1712, 2140, 2362, 3424, 4280, 4724, 5905, 8560, 9448, 11810, 17120, 18896, 23620, 37792, 47240, 94480, 126367, 188960, 252734, 505468, 631835, 1010936, 1263670, 2021872, 2527340, 4043744, 5054680, 10109360, 20218720]

約数ペア:

[(1, 20218720), (2, 10109360), (4, 5054680), (5, 4043744), (8, 2527340), (10, 2021872), (16, 1263670), (20, 1010936), (32, 631835), (40, 505468), (80, 252734), (107, 188960), (160, 126367), (214, 94480), (428, 47240), (535, 37792), (856, 23620), (1070, 18896), (1181, 17120), (1712, 11810), (2140, 9448), (2362, 8560), (3424, 5905), (4280, 4724)]