21067540

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^2\times {\mathrm{23}}^1\times {\mathrm{271}}^1$

素因数の和:329

約数の個数: 72

約数和(自身を含む): 50174208

約数和(自身を除く): 29106668

約数列:

[1, 2, 4, 5, 10, 13, 20, 23, 26, 46, 52, 65, 92, 115, 130, 169, 230, 260, 271, 299, 338, 460, 542, 598, 676, 845, 1084, 1196, 1355, 1495, 1690, 2710, 2990, 3380, 3523, 3887, 5420, 5980, 6233, 7046, 7774, 12466, 14092, 15548, 17615, 19435, 24932, 31165, 35230, 38870, 45799, 62330, 70460, 77740, 81029, 91598, 124660, 162058, 183196, 228995, 324116, 405145, 457990, 810290, 915980, 1053377, 1620580, 2106754, 4213508, 5266885, 10533770, 21067540]

約数ペア:

[(1, 21067540), (2, 10533770), (4, 5266885), (5, 4213508), (10, 2106754), (13, 1620580), (20, 1053377), (23, 915980), (26, 810290), (46, 457990), (52, 405145), (65, 324116), (92, 228995), (115, 183196), (130, 162058), (169, 124660), (230, 91598), (260, 81029), (271, 77740), (299, 70460), (338, 62330), (460, 45799), (542, 38870), (598, 35230), (676, 31165), (845, 24932), (1084, 19435), (1196, 17615), (1355, 15548), (1495, 14092), (1690, 12466), (2710, 7774), (2990, 7046), (3380, 6233), (3523, 5980), (3887, 5420)]