21020350

素因数分解:

$2^1\times 5^2\times {\mathrm{13}}^1\times {\mathrm{73}}^1\times {\mathrm{443}}^1$

素因数の和:541

約数の個数: 48

約数和(自身を含む): 42778512

約数和(自身を除く): 21758162

約数列:

[1, 2, 5, 10, 13, 25, 26, 50, 65, 73, 130, 146, 325, 365, 443, 650, 730, 886, 949, 1825, 1898, 2215, 3650, 4430, 4745, 5759, 9490, 11075, 11518, 22150, 23725, 28795, 32339, 47450, 57590, 64678, 143975, 161695, 287950, 323390, 420407, 808475, 840814, 1616950, 2102035, 4204070, 10510175, 21020350]

約数ペア:

[(1, 21020350), (2, 10510175), (5, 4204070), (10, 2102035), (13, 1616950), (25, 840814), (26, 808475), (50, 420407), (65, 323390), (73, 287950), (130, 161695), (146, 143975), (325, 64678), (365, 57590), (443, 47450), (650, 32339), (730, 28795), (886, 23725), (949, 22150), (1825, 11518), (1898, 11075), (2215, 9490), (3650, 5759), (4430, 4745)]