20712681

素因数分解:

$3^2\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{397}}^1$

素因数の和:462

約数の個数: 48

約数和(自身を含む): 35762688

約数和(自身を除く): 15050007

約数列:

[1, 3, 9, 11, 17, 31, 33, 51, 93, 99, 153, 187, 279, 341, 397, 527, 561, 1023, 1191, 1581, 1683, 3069, 3573, 4367, 4743, 5797, 6749, 12307, 13101, 17391, 20247, 36921, 39303, 52173, 60741, 74239, 110763, 135377, 209219, 222717, 406131, 627657, 668151, 1218393, 1882971, 2301409, 6904227, 20712681]

約数ペア:

[(1, 20712681), (3, 6904227), (9, 2301409), (11, 1882971), (17, 1218393), (31, 668151), (33, 627657), (51, 406131), (93, 222717), (99, 209219), (153, 135377), (187, 110763), (279, 74239), (341, 60741), (397, 52173), (527, 39303), (561, 36921), (1023, 20247), (1191, 17391), (1581, 13101), (1683, 12307), (3069, 6749), (3573, 5797), (4367, 4743)]