20816315

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{41}}^1\times {\mathrm{73}}^1\times {\mathrm{107}}^1$

素因数の和:239

約数の個数: 32

約数和(自身を含む): 28195776

約数和(自身を除く): 7379461

約数列:

[1, 5, 13, 41, 65, 73, 107, 205, 365, 533, 535, 949, 1391, 2665, 2993, 4387, 4745, 6955, 7811, 14965, 21935, 38909, 39055, 57031, 101543, 194545, 285155, 320251, 507715, 1601255, 4163263, 20816315]

約数ペア:

[(1, 20816315), (5, 4163263), (13, 1601255), (41, 507715), (65, 320251), (73, 285155), (107, 194545), (205, 101543), (365, 57031), (533, 39055), (535, 38909), (949, 21935), (1391, 14965), (2665, 7811), (2993, 6955), (4387, 4745)]