21980695

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{13781}}^1$

素因数の和:13826

約数の個数: 16

約数和(自身を含む): 29769120

約数和(自身を除く): 7788425

約数列:

[1, 5, 11, 29, 55, 145, 319, 1595, 13781, 68905, 151591, 399649, 757955, 1998245, 4396139, 21980695]

約数ペア:

[(1, 21980695), (5, 4396139), (11, 1998245), (29, 757955), (55, 399649), (145, 151591), (319, 68905), (1595, 13781)]