21746920

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^2\times {\mathrm{3217}}^1$

素因数の和:3254

約数の個数: 48

約数和(自身を含む): 53000460

約数和(自身を除く): 31253540

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 169, 260, 338, 520, 676, 845, 1352, 1690, 3217, 3380, 6434, 6760, 12868, 16085, 25736, 32170, 41821, 64340, 83642, 128680, 167284, 209105, 334568, 418210, 543673, 836420, 1087346, 1672840, 2174692, 2718365, 4349384, 5436730, 10873460, 21746920]

約数ペア:

[(1, 21746920), (2, 10873460), (4, 5436730), (5, 4349384), (8, 2718365), (10, 2174692), (13, 1672840), (20, 1087346), (26, 836420), (40, 543673), (52, 418210), (65, 334568), (104, 209105), (130, 167284), (169, 128680), (260, 83642), (338, 64340), (520, 41821), (676, 32170), (845, 25736), (1352, 16085), (1690, 12868), (3217, 6760), (3380, 6434)]