18639775

素因数分解:

$5^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{421}}^1$

素因数の和:472

約数の個数: 48

約数和(自身を含む): 30140928

約数和(自身を除く): 11501153

約数列:

[1, 5, 7, 11, 23, 25, 35, 55, 77, 115, 161, 175, 253, 275, 385, 421, 575, 805, 1265, 1771, 1925, 2105, 2947, 4025, 4631, 6325, 8855, 9683, 10525, 14735, 23155, 32417, 44275, 48415, 67781, 73675, 106513, 115775, 162085, 242075, 338905, 532565, 745591, 810425, 1694525, 2662825, 3727955, 18639775]

約数ペア:

[(1, 18639775), (5, 3727955), (7, 2662825), (11, 1694525), (23, 810425), (25, 745591), (35, 532565), (55, 338905), (77, 242075), (115, 162085), (161, 115775), (175, 106513), (253, 73675), (275, 67781), (385, 48415), (421, 44275), (575, 32417), (805, 23155), (1265, 14735), (1771, 10525), (1925, 9683), (2105, 8855), (2947, 6325), (4025, 4631)]