20697912

素因数分解:

$2^3\times 3^2\times {\mathrm{389}}^1\times {\mathrm{739}}^1$

素因数の和:1140

約数の個数: 48

約数和(自身を含む): 56277000

約数和(自身を除く): 35579088

約数列:

[1, 2, 3, 4, 6, 8, 9, 12, 18, 24, 36, 72, 389, 739, 778, 1167, 1478, 1556, 2217, 2334, 2956, 3112, 3501, 4434, 4668, 5912, 6651, 7002, 8868, 9336, 13302, 14004, 17736, 26604, 28008, 53208, 287471, 574942, 862413, 1149884, 1724826, 2299768, 2587239, 3449652, 5174478, 6899304, 10348956, 20697912]

約数ペア:

[(1, 20697912), (2, 10348956), (3, 6899304), (4, 5174478), (6, 3449652), (8, 2587239), (9, 2299768), (12, 1724826), (18, 1149884), (24, 862413), (36, 574942), (72, 287471), (389, 53208), (739, 28008), (778, 26604), (1167, 17736), (1478, 14004), (1556, 13302), (2217, 9336), (2334, 8868), (2956, 7002), (3112, 6651), (3501, 5912), (4434, 4668)]