21812680

素因数分解:

$2^3\times 5^1\times {\mathrm{53}}^1\times {\mathrm{10289}}^1$

素因数の和:10353

約数の個数: 32

約数和(自身を含む): 50009400

約数和(自身を除く): 28196720

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 53, 106, 212, 265, 424, 530, 1060, 2120, 10289, 20578, 41156, 51445, 82312, 102890, 205780, 411560, 545317, 1090634, 2181268, 2726585, 4362536, 5453170, 10906340, 21812680]

約数ペア:

[(1, 21812680), (2, 10906340), (4, 5453170), (5, 4362536), (8, 2726585), (10, 2181268), (20, 1090634), (40, 545317), (53, 411560), (106, 205780), (212, 102890), (265, 82312), (424, 51445), (530, 41156), (1060, 20578), (2120, 10289)]