21113505

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{97}}^1\times {\mathrm{691}}^1$

素因数の和:806

約数の個数: 48

約数和(自身を含む): 42317184

約数和(自身を除く): 21203679

約数列:

[1, 3, 5, 7, 9, 15, 21, 35, 45, 63, 97, 105, 291, 315, 485, 679, 691, 873, 1455, 2037, 2073, 3395, 3455, 4365, 4837, 6111, 6219, 10185, 10365, 14511, 24185, 30555, 31095, 43533, 67027, 72555, 201081, 217665, 335135, 469189, 603243, 1005405, 1407567, 2345945, 3016215, 4222701, 7037835, 21113505]

約数ペア:

[(1, 21113505), (3, 7037835), (5, 4222701), (7, 3016215), (9, 2345945), (15, 1407567), (21, 1005405), (35, 603243), (45, 469189), (63, 335135), (97, 217665), (105, 201081), (291, 72555), (315, 67027), (485, 43533), (679, 31095), (691, 30555), (873, 24185), (1455, 14511), (2037, 10365), (2073, 10185), (3395, 6219), (3455, 6111), (4365, 4837)]