21145340

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{107}}^1\times {\mathrm{241}}^1$

素因数の和:398

約数の個数: 48

約数和(自身を含む): 46103904

約数和(自身を除く): 24958564

約数列:

[1, 2, 4, 5, 10, 20, 41, 82, 107, 164, 205, 214, 241, 410, 428, 482, 535, 820, 964, 1070, 1205, 2140, 2410, 4387, 4820, 8774, 9881, 17548, 19762, 21935, 25787, 39524, 43870, 49405, 51574, 87740, 98810, 103148, 128935, 197620, 257870, 515740, 1057267, 2114534, 4229068, 5286335, 10572670, 21145340]

約数ペア:

[(1, 21145340), (2, 10572670), (4, 5286335), (5, 4229068), (10, 2114534), (20, 1057267), (41, 515740), (82, 257870), (107, 197620), (164, 128935), (205, 103148), (214, 98810), (241, 87740), (410, 51574), (428, 49405), (482, 43870), (535, 39524), (820, 25787), (964, 21935), (1070, 19762), (1205, 17548), (2140, 9881), (2410, 8774), (4387, 4820)]