21453185

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{29}}^1\times {\mathrm{599}}^1$

素因数の和:665

約数の個数: 32

約数和(自身を含む): 30240000

約数和(自身を除く): 8786815

約数列:

[1, 5, 13, 19, 29, 65, 95, 145, 247, 377, 551, 599, 1235, 1885, 2755, 2995, 7163, 7787, 11381, 17371, 35815, 38935, 56905, 86855, 147953, 225823, 330049, 739765, 1129115, 1650245, 4290637, 21453185]

約数ペア:

[(1, 21453185), (5, 4290637), (13, 1650245), (19, 1129115), (29, 739765), (65, 330049), (95, 225823), (145, 147953), (247, 86855), (377, 56905), (551, 38935), (599, 35815), (1235, 17371), (1885, 11381), (2755, 7787), (2995, 7163)]