20517035

素因数分解:

$5^1\times 7^2\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{331}}^1$

素因数の和:384

約数の個数: 48

約数和(自身を含む): 32700672

約数和(自身を除く): 12183637

約数列:

[1, 5, 7, 11, 23, 35, 49, 55, 77, 115, 161, 245, 253, 331, 385, 539, 805, 1127, 1265, 1655, 1771, 2317, 2695, 3641, 5635, 7613, 8855, 11585, 12397, 16219, 18205, 25487, 38065, 53291, 61985, 81095, 83743, 127435, 178409, 266455, 373037, 418715, 586201, 892045, 1865185, 2931005, 4103407, 20517035]

約数ペア:

[(1, 20517035), (5, 4103407), (7, 2931005), (11, 1865185), (23, 892045), (35, 586201), (49, 418715), (55, 373037), (77, 266455), (115, 178409), (161, 127435), (245, 83743), (253, 81095), (331, 61985), (385, 53291), (539, 38065), (805, 25487), (1127, 18205), (1265, 16219), (1655, 12397), (1771, 11585), (2317, 8855), (2695, 7613), (3641, 5635)]