21368165

素因数分解:

$5^1\times 7^2\times {\mathrm{13}}^1\times {\mathrm{6709}}^1$

素因数の和:6741

約数の個数: 24

約数和(自身を含む): 32127480

約数和(自身を除く): 10759315

約数列:

[1, 5, 7, 13, 35, 49, 65, 91, 245, 455, 637, 3185, 6709, 33545, 46963, 87217, 234815, 328741, 436085, 610519, 1643705, 3052595, 4273633, 21368165]

約数ペア:

[(1, 21368165), (5, 4273633), (7, 3052595), (13, 1643705), (35, 610519), (49, 436085), (65, 328741), (91, 234815), (245, 87217), (455, 46963), (637, 33545), (3185, 6709)]