21728871

素因数分解:

$3^3\times {\mathrm{61}}^1\times {\mathrm{79}}^1\times {\mathrm{167}}^1$

素因数の和:316

約数の個数: 32

約数和(自身を含む): 33331200

約数和(自身を除く): 11602329

約数列:

[1, 3, 9, 27, 61, 79, 167, 183, 237, 501, 549, 711, 1503, 1647, 2133, 4509, 4819, 10187, 13193, 14457, 30561, 39579, 43371, 91683, 118737, 130113, 275049, 356211, 804773, 2414319, 7242957, 21728871]

約数ペア:

[(1, 21728871), (3, 7242957), (9, 2414319), (27, 804773), (61, 356211), (79, 275049), (167, 130113), (183, 118737), (237, 91683), (501, 43371), (549, 39579), (711, 30561), (1503, 14457), (1647, 13193), (2133, 10187), (4509, 4819)]