21388465

素因数分解:

$5^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{103}}^1\times {\mathrm{349}}^1$

素因数の和:481

約数の個数: 32

約数和(自身を含む): 31449600

約数和(自身を除く): 10061135

約数列:

[1, 5, 7, 17, 35, 85, 103, 119, 349, 515, 595, 721, 1745, 1751, 2443, 3605, 5933, 8755, 12215, 12257, 29665, 35947, 41531, 61285, 179735, 207655, 251629, 611099, 1258145, 3055495, 4277693, 21388465]

約数ペア:

[(1, 21388465), (5, 4277693), (7, 3055495), (17, 1258145), (35, 611099), (85, 251629), (103, 207655), (119, 179735), (349, 61285), (515, 41531), (595, 35947), (721, 29665), (1745, 12257), (1751, 12215), (2443, 8755), (3605, 5933)]