21716890

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{89}}^1\times {\mathrm{1877}}^1$

素因数の和:1986

約数の個数: 32

約数和(自身を含む): 42593040

約数和(自身を除く): 20876150

約数列:

[1, 2, 5, 10, 13, 26, 65, 89, 130, 178, 445, 890, 1157, 1877, 2314, 3754, 5785, 9385, 11570, 18770, 24401, 48802, 122005, 167053, 244010, 334106, 835265, 1670530, 2171689, 4343378, 10858445, 21716890]

約数ペア:

[(1, 21716890), (2, 10858445), (5, 4343378), (10, 2171689), (13, 1670530), (26, 835265), (65, 334106), (89, 244010), (130, 167053), (178, 122005), (445, 48802), (890, 24401), (1157, 18770), (1877, 11570), (2314, 9385), (3754, 5785)]