21507458

素因数分解:

$2^1\times 7^1\times {\mathrm{83}}^2\times {\mathrm{223}}^1$

素因数の和:398

約数の個数: 24

約数和(自身を含む): 37486848

約数和(自身を除く): 15979390

約数列:

[1, 2, 7, 14, 83, 166, 223, 446, 581, 1162, 1561, 3122, 6889, 13778, 18509, 37018, 48223, 96446, 129563, 259126, 1536247, 3072494, 10753729, 21507458]

約数ペア:

[(1, 21507458), (2, 10753729), (7, 3072494), (14, 1536247), (83, 259126), (166, 129563), (223, 96446), (446, 48223), (581, 37018), (1162, 18509), (1561, 13778), (3122, 6889)]