21929215

素因数分解:

$5^1\times 7^2\times {\mathrm{11}}^1\times {\mathrm{79}}^1\times {\mathrm{103}}^1$

素因数の和:212

約数の個数: 48

約数和(自身を含む): 34145280

約数和(自身を除く): 12216065

約数列:

[1, 5, 7, 11, 35, 49, 55, 77, 79, 103, 245, 385, 395, 515, 539, 553, 721, 869, 1133, 2695, 2765, 3605, 3871, 4345, 5047, 5665, 6083, 7931, 8137, 19355, 25235, 30415, 39655, 40685, 42581, 55517, 56959, 89507, 212905, 277585, 284795, 398713, 447535, 626549, 1993565, 3132745, 4385843, 21929215]

約数ペア:

[(1, 21929215), (5, 4385843), (7, 3132745), (11, 1993565), (35, 626549), (49, 447535), (55, 398713), (77, 284795), (79, 277585), (103, 212905), (245, 89507), (385, 56959), (395, 55517), (515, 42581), (539, 40685), (553, 39655), (721, 30415), (869, 25235), (1133, 19355), (2695, 8137), (2765, 7931), (3605, 6083), (3871, 5665), (4345, 5047)]