21386715

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{149}}^1\times {\mathrm{1367}}^1$

素因数の和:1531

約数の個数: 32

約数和(自身を含む): 39398400

約数和(自身を除く): 18011685

約数列:

[1, 3, 5, 7, 15, 21, 35, 105, 149, 447, 745, 1043, 1367, 2235, 3129, 4101, 5215, 6835, 9569, 15645, 20505, 28707, 47845, 143535, 203683, 611049, 1018415, 1425781, 3055245, 4277343, 7128905, 21386715]

約数ペア:

[(1, 21386715), (3, 7128905), (5, 4277343), (7, 3055245), (15, 1425781), (21, 1018415), (35, 611049), (105, 203683), (149, 143535), (447, 47845), (745, 28707), (1043, 20505), (1367, 15645), (2235, 9569), (3129, 6835), (4101, 5215)]