20556921

素因数分解:

$3^1\times 7^2\times {\mathrm{11}}^1\times {\mathrm{12713}}^1$

素因数の和:12741

約数の個数: 24

約数和(自身を含む): 34785504

約数和(自身を除く): 14228583

約数列:

[1, 3, 7, 11, 21, 33, 49, 77, 147, 231, 539, 1617, 12713, 38139, 88991, 139843, 266973, 419529, 622937, 978901, 1868811, 2936703, 6852307, 20556921]

約数ペア:

[(1, 20556921), (3, 6852307), (7, 2936703), (11, 1868811), (21, 978901), (33, 622937), (49, 419529), (77, 266973), (147, 139843), (231, 88991), (539, 38139), (1617, 12713)]