21140605

素因数分解:

$5^1\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{71}}^1\times {\mathrm{113}}^1$

素因数の和:237

約数の個数: 32

約数和(自身を含む): 28366848

約数和(自身を除く): 7226243

約数列:

[1, 5, 17, 31, 71, 85, 113, 155, 355, 527, 565, 1207, 1921, 2201, 2635, 3503, 6035, 8023, 9605, 11005, 17515, 37417, 40115, 59551, 136391, 187085, 248713, 297755, 681955, 1243565, 4228121, 21140605]

約数ペア:

[(1, 21140605), (5, 4228121), (17, 1243565), (31, 681955), (71, 297755), (85, 248713), (113, 187085), (155, 136391), (355, 59551), (527, 40115), (565, 37417), (1207, 17515), (1921, 11005), (2201, 9605), (2635, 8023), (3503, 6035)]