21252019

素因数分解:

${\mathrm{31}}^1\times {\mathrm{43}}^1\times {\mathrm{107}}^1\times {\mathrm{149}}^1$

素因数の和:330

約数の個数: 16

約数和(自身を含む): 22809600

約数和(自身を除く): 1557581

約数列:

[1, 31, 43, 107, 149, 1333, 3317, 4601, 4619, 6407, 15943, 142631, 198617, 494233, 685549, 21252019]

約数ペア:

[(1, 21252019), (31, 685549), (43, 494233), (107, 198617), (149, 142631), (1333, 15943), (3317, 6407), (4601, 4619)]