21232520

素因数分解:

$2^3\times 5^1\times {\mathrm{31}}^1\times {\mathrm{17123}}^1$

素因数の和:17165

約数の個数: 32

約数和(自身を含む): 49317120

約数和(自身を除く): 28084600

約数列:

[1, 2, 4, 5, 8, 10, 20, 31, 40, 62, 124, 155, 248, 310, 620, 1240, 17123, 34246, 68492, 85615, 136984, 171230, 342460, 530813, 684920, 1061626, 2123252, 2654065, 4246504, 5308130, 10616260, 21232520]

約数ペア:

[(1, 21232520), (2, 10616260), (4, 5308130), (5, 4246504), (8, 2654065), (10, 2123252), (20, 1061626), (31, 684920), (40, 530813), (62, 342460), (124, 171230), (155, 136984), (248, 85615), (310, 68492), (620, 34246), (1240, 17123)]