20835711

素因数分解:

$3^4\times {\mathrm{13}}^1\times {\mathrm{47}}^1\times {\mathrm{421}}^1$

素因数の和:493

約数の個数: 40

約数和(自身を含む): 34313664

約数和(自身を除く): 13477953

約数列:

[1, 3, 9, 13, 27, 39, 47, 81, 117, 141, 351, 421, 423, 611, 1053, 1263, 1269, 1833, 3789, 3807, 5473, 5499, 11367, 16419, 16497, 19787, 34101, 49257, 49491, 59361, 147771, 178083, 257231, 443313, 534249, 771693, 1602747, 2315079, 6945237, 20835711]

約数ペア:

[(1, 20835711), (3, 6945237), (9, 2315079), (13, 1602747), (27, 771693), (39, 534249), (47, 443313), (81, 257231), (117, 178083), (141, 147771), (351, 59361), (421, 49491), (423, 49257), (611, 34101), (1053, 19787), (1263, 16497), (1269, 16419), (1833, 11367), (3789, 5499), (3807, 5473)]