28365561

素因数分解:

$3^2\times 7^2\times {\mathrm{131}}^1\times {\mathrm{491}}^1$

素因数の和:642

約数の個数: 36

約数和(自身を含む): 48123504

約数和(自身を除く): 19757943

約数列:

[1, 3, 7, 9, 21, 49, 63, 131, 147, 393, 441, 491, 917, 1179, 1473, 2751, 3437, 4419, 6419, 8253, 10311, 19257, 24059, 30933, 57771, 64321, 72177, 192963, 216531, 450247, 578889, 1350741, 3151729, 4052223, 9455187, 28365561]

約数ペア:

[(1, 28365561), (3, 9455187), (7, 4052223), (9, 3151729), (21, 1350741), (49, 578889), (63, 450247), (131, 216531), (147, 192963), (393, 72177), (441, 64321), (491, 57771), (917, 30933), (1179, 24059), (1473, 19257), (2751, 10311), (3437, 8253), (4419, 6419)]