20978720

素因数分解:

$2^5\times 5^1\times 7^1\times {\mathrm{18731}}^1$

素因数の和:18753

約数の個数: 48

約数和(自身を含む): 56645568

約数和(自身を除く): 35666848

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 32, 35, 40, 56, 70, 80, 112, 140, 160, 224, 280, 560, 1120, 18731, 37462, 74924, 93655, 131117, 149848, 187310, 262234, 299696, 374620, 524468, 599392, 655585, 749240, 1048936, 1311170, 1498480, 2097872, 2622340, 2996960, 4195744, 5244680, 10489360, 20978720]

約数ペア:

[(1, 20978720), (2, 10489360), (4, 5244680), (5, 4195744), (7, 2996960), (8, 2622340), (10, 2097872), (14, 1498480), (16, 1311170), (20, 1048936), (28, 749240), (32, 655585), (35, 599392), (40, 524468), (56, 374620), (70, 299696), (80, 262234), (112, 187310), (140, 149848), (160, 131117), (224, 93655), (280, 74924), (560, 37462), (1120, 18731)]