20821212

素因数分解:

$2^2\times 3^5\times {\mathrm{31}}^1\times {\mathrm{691}}^1$

素因数の和:741

約数の個数: 72

約数和(自身を含む): 56422912

約数和(自身を除く): 35601700

約数列:

[1, 2, 3, 4, 6, 9, 12, 18, 27, 31, 36, 54, 62, 81, 93, 108, 124, 162, 186, 243, 279, 324, 372, 486, 558, 691, 837, 972, 1116, 1382, 1674, 2073, 2511, 2764, 3348, 4146, 5022, 6219, 7533, 8292, 10044, 12438, 15066, 18657, 21421, 24876, 30132, 37314, 42842, 55971, 64263, 74628, 85684, 111942, 128526, 167913, 192789, 223884, 257052, 335826, 385578, 578367, 671652, 771156, 1156734, 1735101, 2313468, 3470202, 5205303, 6940404, 10410606, 20821212]

約数ペア:

[(1, 20821212), (2, 10410606), (3, 6940404), (4, 5205303), (6, 3470202), (9, 2313468), (12, 1735101), (18, 1156734), (27, 771156), (31, 671652), (36, 578367), (54, 385578), (62, 335826), (81, 257052), (93, 223884), (108, 192789), (124, 167913), (162, 128526), (186, 111942), (243, 85684), (279, 74628), (324, 64263), (372, 55971), (486, 42842), (558, 37314), (691, 30132), (837, 24876), (972, 21421), (1116, 18657), (1382, 15066), (1674, 12438), (2073, 10044), (2511, 8292), (2764, 7533), (3348, 6219), (4146, 5022)]