21432747

素因数分解:

$3^1\times 7^2\times {\mathrm{211}}^1\times {\mathrm{691}}^1$

素因数の和:919

約数の個数: 24

約数和(自身を含む): 33448512

約数和(自身を除く): 12015765

約数列:

[1, 3, 7, 21, 49, 147, 211, 633, 691, 1477, 2073, 4431, 4837, 10339, 14511, 31017, 33859, 101577, 145801, 437403, 1020607, 3061821, 7144249, 21432747]

約数ペア:

[(1, 21432747), (3, 7144249), (7, 3061821), (21, 1020607), (49, 437403), (147, 145801), (211, 101577), (633, 33859), (691, 31017), (1477, 14511), (2073, 10339), (4431, 4837)]