18265975

素因数分解:

$5^2\times 7^2\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{37}}^1$

素因数の和:105

約数の個数: 72

約数和(自身を含む): 30081408

約数和(自身を除く): 11815433

約数列:

[1, 5, 7, 13, 25, 31, 35, 37, 49, 65, 91, 155, 175, 185, 217, 245, 259, 325, 403, 455, 481, 637, 775, 925, 1085, 1147, 1225, 1295, 1519, 1813, 2015, 2275, 2405, 2821, 3185, 3367, 5425, 5735, 6475, 7595, 8029, 9065, 10075, 12025, 14105, 14911, 15925, 16835, 19747, 23569, 28675, 37975, 40145, 45325, 56203, 70525, 74555, 84175, 98735, 104377, 117845, 200725, 281015, 372775, 493675, 521885, 589225, 730639, 1405075, 2609425, 3653195, 18265975]

約数ペア:

[(1, 18265975), (5, 3653195), (7, 2609425), (13, 1405075), (25, 730639), (31, 589225), (35, 521885), (37, 493675), (49, 372775), (65, 281015), (91, 200725), (155, 117845), (175, 104377), (185, 98735), (217, 84175), (245, 74555), (259, 70525), (325, 56203), (403, 45325), (455, 40145), (481, 37975), (637, 28675), (775, 23569), (925, 19747), (1085, 16835), (1147, 15925), (1225, 14911), (1295, 14105), (1519, 12025), (1813, 10075), (2015, 9065), (2275, 8029), (2405, 7595), (2821, 6475), (3185, 5735), (3367, 5425)]