20656713

素因数分解:

$3^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{223}}^1\times {\mathrm{401}}^1$

素因数の和:645

約数の個数: 32

約数和(自身を含む): 34578432

約数和(自身を除く): 13921719

約数列:

[1, 3, 7, 11, 21, 33, 77, 223, 231, 401, 669, 1203, 1561, 2453, 2807, 4411, 4683, 7359, 8421, 13233, 17171, 30877, 51513, 89423, 92631, 268269, 625961, 983653, 1877883, 2950959, 6885571, 20656713]

約数ペア:

[(1, 20656713), (3, 6885571), (7, 2950959), (11, 1877883), (21, 983653), (33, 625961), (77, 268269), (223, 92631), (231, 89423), (401, 51513), (669, 30877), (1203, 17171), (1561, 13233), (2453, 8421), (2807, 7359), (4411, 4683)]