21220640

素因数分解:

$2^5\times 5^1\times 7^1\times {\mathrm{18947}}^1$

素因数の和:18969

約数の個数: 48

約数和(自身を含む): 57298752

約数和(自身を除く): 36078112

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, 18947, 37894, 75788, 94735, 132629, 151576, 189470, 265258, 303152, 378940, 530516, 606304, 663145, 757880, 1061032, 1326290, 1515760, 2122064, 2652580, 3031520, 4244128, 5305160, 10610320, 21220640]

約数ペア:

[(1, 21220640), (2, 10610320), (4, 5305160), (5, 4244128), (7, 3031520), (8, 2652580), (10, 2122064), (14, 1515760), (16, 1326290), (20, 1061032), (28, 757880), (32, 663145), (35, 606304), (40, 530516), (56, 378940), (70, 303152), (80, 265258), (112, 189470), (140, 151576), (160, 132629), (224, 94735), (280, 75788), (560, 37894), (1120, 18947)]