21540790

素因数分解:

$2^1\times 5^1\times {\mathrm{53}}^1\times {\mathrm{97}}^1\times {\mathrm{419}}^1$

素因数の和:576

約数の個数: 32

約数和(自身を含む): 40007520

約数和(自身を除く): 18466730

約数列:

[1, 2, 5, 10, 53, 97, 106, 194, 265, 419, 485, 530, 838, 970, 2095, 4190, 5141, 10282, 22207, 25705, 40643, 44414, 51410, 81286, 111035, 203215, 222070, 406430, 2154079, 4308158, 10770395, 21540790]

約数ペア:

[(1, 21540790), (2, 10770395), (5, 4308158), (10, 2154079), (53, 406430), (97, 222070), (106, 203215), (194, 111035), (265, 81286), (419, 51410), (485, 44414), (530, 40643), (838, 25705), (970, 22207), (2095, 10282), (4190, 5141)]