20520416

素因数分解:

$2^5\times 7^2\times {\mathrm{23}}^1\times {\mathrm{569}}^1$

素因数の和:616

約数の個数: 72

約数和(自身を含む): 49124880

約数和(自身を除く): 28604464

約数列:

[1, 2, 4, 7, 8, 14, 16, 23, 28, 32, 46, 49, 56, 92, 98, 112, 161, 184, 196, 224, 322, 368, 392, 569, 644, 736, 784, 1127, 1138, 1288, 1568, 2254, 2276, 2576, 3983, 4508, 4552, 5152, 7966, 9016, 9104, 13087, 15932, 18032, 18208, 26174, 27881, 31864, 36064, 52348, 55762, 63728, 91609, 104696, 111524, 127456, 183218, 209392, 223048, 366436, 418784, 446096, 641263, 732872, 892192, 1282526, 1465744, 2565052, 2931488, 5130104, 10260208, 20520416]

約数ペア:

[(1, 20520416), (2, 10260208), (4, 5130104), (7, 2931488), (8, 2565052), (14, 1465744), (16, 1282526), (23, 892192), (28, 732872), (32, 641263), (46, 446096), (49, 418784), (56, 366436), (92, 223048), (98, 209392), (112, 183218), (161, 127456), (184, 111524), (196, 104696), (224, 91609), (322, 63728), (368, 55762), (392, 52348), (569, 36064), (644, 31864), (736, 27881), (784, 26174), (1127, 18208), (1138, 18032), (1288, 15932), (1568, 13087), (2254, 9104), (2276, 9016), (2576, 7966), (3983, 5152), (4508, 4552)]