21915531

素因数分解:

$3^2\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{61}}^1\times {\mathrm{191}}^1$

素因数の和:288

約数の個数: 48

約数和(自身を含む): 37140480

約数和(自身を除く): 15224949

約数列:

[1, 3, 9, 11, 19, 33, 57, 61, 99, 171, 183, 191, 209, 549, 573, 627, 671, 1159, 1719, 1881, 2013, 2101, 3477, 3629, 6039, 6303, 10431, 10887, 11651, 12749, 18909, 32661, 34953, 38247, 39919, 104859, 114741, 119757, 128161, 221369, 359271, 384483, 664107, 1153449, 1992321, 2435059, 7305177, 21915531]

約数ペア:

[(1, 21915531), (3, 7305177), (9, 2435059), (11, 1992321), (19, 1153449), (33, 664107), (57, 384483), (61, 359271), (99, 221369), (171, 128161), (183, 119757), (191, 114741), (209, 104859), (549, 39919), (573, 38247), (627, 34953), (671, 32661), (1159, 18909), (1719, 12749), (1881, 11651), (2013, 10887), (2101, 10431), (3477, 6303), (3629, 6039)]