21093520

素因数分解:

$2^4\times 5^1\times 7^2\times {\mathrm{5381}}^1$

素因数の和:5408

約数の個数: 60

約数和(自身を含む): 57059964

約数和(自身を除く): 35966444

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 49, 56, 70, 80, 98, 112, 140, 196, 245, 280, 392, 490, 560, 784, 980, 1960, 3920, 5381, 10762, 21524, 26905, 37667, 43048, 53810, 75334, 86096, 107620, 150668, 188335, 215240, 263669, 301336, 376670, 430480, 527338, 602672, 753340, 1054676, 1318345, 1506680, 2109352, 2636690, 3013360, 4218704, 5273380, 10546760, 21093520]

約数ペア:

[(1, 21093520), (2, 10546760), (4, 5273380), (5, 4218704), (7, 3013360), (8, 2636690), (10, 2109352), (14, 1506680), (16, 1318345), (20, 1054676), (28, 753340), (35, 602672), (40, 527338), (49, 430480), (56, 376670), (70, 301336), (80, 263669), (98, 215240), (112, 188335), (140, 150668), (196, 107620), (245, 86096), (280, 75334), (392, 53810), (490, 43048), (560, 37667), (784, 26905), (980, 21524), (1960, 10762), (3920, 5381)]