20620745

素因数分解:

$5^1\times {\mathrm{17}}^1\times {\mathrm{41}}^1\times {\mathrm{61}}^1\times {\mathrm{97}}^1$

素因数の和:221

約数の個数: 32

約数和(自身を含む): 27560736

約数和(自身を除く): 6939991

約数列:

[1, 5, 17, 41, 61, 85, 97, 205, 305, 485, 697, 1037, 1649, 2501, 3485, 3977, 5185, 5917, 8245, 12505, 19885, 29585, 42517, 67609, 100589, 212585, 242597, 338045, 502945, 1212985, 4124149, 20620745]

約数ペア:

[(1, 20620745), (5, 4124149), (17, 1212985), (41, 502945), (61, 338045), (85, 242597), (97, 212585), (205, 100589), (305, 67609), (485, 42517), (697, 29585), (1037, 19885), (1649, 12505), (2501, 8245), (3485, 5917), (3977, 5185)]