21284290

素因数分解:

$2^1\times 5^1\times {\mathrm{31}}^1\times {\mathrm{68659}}^1$

素因数の和:68697

約数の個数: 16

約数和(自身を含む): 39548160

約数和(自身を除く): 18263870

約数列:

[1, 2, 5, 10, 31, 62, 155, 310, 68659, 137318, 343295, 686590, 2128429, 4256858, 10642145, 21284290]

約数ペア:

[(1, 21284290), (2, 10642145), (5, 4256858), (10, 2128429), (31, 686590), (62, 343295), (155, 137318), (310, 68659)]