20921841

素因数分解:

$3^3\times {\mathrm{61}}^1\times {\mathrm{12703}}^1$

素因数の和:12773

約数の個数: 16

約数和(自身を含む): 31505920

約数和(自身を除く): 10584079

約数列:

[1, 3, 9, 27, 61, 183, 549, 1647, 12703, 38109, 114327, 342981, 774883, 2324649, 6973947, 20921841]

約数ペア:

[(1, 20921841), (3, 6973947), (9, 2324649), (27, 774883), (61, 342981), (183, 114327), (549, 38109), (1647, 12703)]