21317816

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{204979}}^1$

素因数の和:204998

約数の個数: 16

約数和(自身を含む): 43045800

約数和(自身を除く): 21727984

約数列:

[1, 2, 4, 8, 13, 26, 52, 104, 204979, 409958, 819916, 1639832, 2664727, 5329454, 10658908, 21317816]

約数ペア:

[(1, 21317816), (2, 10658908), (4, 5329454), (8, 2664727), (13, 1639832), (26, 819916), (52, 409958), (104, 204979)]