21869705

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{73}}^1\times {\mathrm{419}}^1$

素因数の和:521

約数の個数: 32

約数和(自身を含む): 31328640

約数和(自身を除く): 9458935

約数列:

[1, 5, 11, 13, 55, 65, 73, 143, 365, 419, 715, 803, 949, 2095, 4015, 4609, 4745, 5447, 10439, 23045, 27235, 30587, 52195, 59917, 152935, 299585, 336457, 397631, 1682285, 1988155, 4373941, 21869705]

約数ペア:

[(1, 21869705), (5, 4373941), (11, 1988155), (13, 1682285), (55, 397631), (65, 336457), (73, 299585), (143, 152935), (365, 59917), (419, 52195), (715, 30587), (803, 27235), (949, 23045), (2095, 10439), (4015, 5447), (4609, 4745)]