21227480

素因数分解:

$2^3\times 5^1\times {\mathrm{97}}^1\times {\mathrm{5471}}^1$

素因数の和:5579

約数の個数: 32

約数和(自身を含む): 48263040

約数和(自身を除く): 27035560

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 97, 194, 388, 485, 776, 970, 1940, 3880, 5471, 10942, 21884, 27355, 43768, 54710, 109420, 218840, 530687, 1061374, 2122748, 2653435, 4245496, 5306870, 10613740, 21227480]

約数ペア:

[(1, 21227480), (2, 10613740), (4, 5306870), (5, 4245496), (8, 2653435), (10, 2122748), (20, 1061374), (40, 530687), (97, 218840), (194, 109420), (388, 54710), (485, 43768), (776, 27355), (970, 21884), (1940, 10942), (3880, 5471)]