21976820

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{26801}}^1$

素因数の和:26851

約数の個数: 24

約数和(自身を含む): 47278728

約数和(自身を除く): 25301908

約数列:

[1, 2, 4, 5, 10, 20, 41, 82, 164, 205, 410, 820, 26801, 53602, 107204, 134005, 268010, 536020, 1098841, 2197682, 4395364, 5494205, 10988410, 21976820]

約数ペア:

[(1, 21976820), (2, 10988410), (4, 5494205), (5, 4395364), (10, 2197682), (20, 1098841), (41, 536020), (82, 268010), (164, 134005), (205, 107204), (410, 53602), (820, 26801)]