20397405

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{79}}^1\times {\mathrm{2459}}^1$

素因数の和:2553

約数の個数: 32

約数和(自身を含む): 37785600

約数和(自身を除く): 17388195

約数列:

[1, 3, 5, 7, 15, 21, 35, 79, 105, 237, 395, 553, 1185, 1659, 2459, 2765, 7377, 8295, 12295, 17213, 36885, 51639, 86065, 194261, 258195, 582783, 971305, 1359827, 2913915, 4079481, 6799135, 20397405]

約数ペア:

[(1, 20397405), (3, 6799135), (5, 4079481), (7, 2913915), (15, 1359827), (21, 971305), (35, 582783), (79, 258195), (105, 194261), (237, 86065), (395, 51639), (553, 36885), (1185, 17213), (1659, 12295), (2459, 8295), (2765, 7377)]