18120895

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{23}}^2\times {\mathrm{31}}^1$

素因数の和:112

約数の個数: 48

約数和(自身を含む): 26756352

約数和(自身を除く): 8635457

約数列:

[1, 5, 13, 17, 23, 31, 65, 85, 115, 155, 221, 299, 391, 403, 527, 529, 713, 1105, 1495, 1955, 2015, 2635, 2645, 3565, 5083, 6851, 6877, 8993, 9269, 12121, 16399, 25415, 34255, 34385, 44965, 46345, 60605, 81995, 116909, 157573, 213187, 278783, 584545, 787865, 1065935, 1393915, 3624179, 18120895]

約数ペア:

[(1, 18120895), (5, 3624179), (13, 1393915), (17, 1065935), (23, 787865), (31, 584545), (65, 278783), (85, 213187), (115, 157573), (155, 116909), (221, 81995), (299, 60605), (391, 46345), (403, 44965), (527, 34385), (529, 34255), (713, 25415), (1105, 16399), (1495, 12121), (1955, 9269), (2015, 8993), (2635, 6877), (2645, 6851), (3565, 5083)]