21492920

素因数分解:

$2^3\times 5^1\times {\mathrm{31}}^1\times {\mathrm{17333}}^1$

素因数の和:17375

約数の個数: 32

約数和(自身を含む): 49921920

約数和(自身を除く): 28429000

約数列:

[1, 2, 4, 5, 8, 10, 20, 31, 40, 62, 124, 155, 248, 310, 620, 1240, 17333, 34666, 69332, 86665, 138664, 173330, 346660, 537323, 693320, 1074646, 2149292, 2686615, 4298584, 5373230, 10746460, 21492920]

約数ペア:

[(1, 21492920), (2, 10746460), (4, 5373230), (5, 4298584), (8, 2686615), (10, 2149292), (20, 1074646), (31, 693320), (40, 537323), (62, 346660), (124, 173330), (155, 138664), (248, 86665), (310, 69332), (620, 34666), (1240, 17333)]