81309865

素因数分解:

$5^1\times 7^4\times {\mathrm{13}}^1\times {\mathrm{521}}^1$

素因数の和:567

約数の個数: 40

約数和(自身を含む): 122818248

約数和(自身を除く): 41508383

約数列:

[1, 5, 7, 13, 35, 49, 65, 91, 245, 343, 455, 521, 637, 1715, 2401, 2605, 3185, 3647, 4459, 6773, 12005, 18235, 22295, 25529, 31213, 33865, 47411, 127645, 156065, 178703, 237055, 331877, 893515, 1250921, 1659385, 2323139, 6254605, 11615695, 16261973, 81309865]

約数ペア:

[(1, 81309865), (5, 16261973), (7, 11615695), (13, 6254605), (35, 2323139), (49, 1659385), (65, 1250921), (91, 893515), (245, 331877), (343, 237055), (455, 178703), (521, 156065), (637, 127645), (1715, 47411), (2401, 33865), (2605, 31213), (3185, 25529), (3647, 22295), (4459, 18235), (6773, 12005)]