21981040

素因数分解:

$2^4\times 5^1\times {\mathrm{59}}^1\times {\mathrm{4657}}^1$

素因数の和:4729

約数の個数: 40

約数和(自身を含む): 51983280

約数和(自身を除く): 30002240

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 59, 80, 118, 236, 295, 472, 590, 944, 1180, 2360, 4657, 4720, 9314, 18628, 23285, 37256, 46570, 74512, 93140, 186280, 274763, 372560, 549526, 1099052, 1373815, 2198104, 2747630, 4396208, 5495260, 10990520, 21981040]

約数ペア:

[(1, 21981040), (2, 10990520), (4, 5495260), (5, 4396208), (8, 2747630), (10, 2198104), (16, 1373815), (20, 1099052), (40, 549526), (59, 372560), (80, 274763), (118, 186280), (236, 93140), (295, 74512), (472, 46570), (590, 37256), (944, 23285), (1180, 18628), (2360, 9314), (4657, 4720)]