21196840

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{75703}}^1$

素因数の和:75721

約数の個数: 32

約数和(自身を含む): 54506880

約数和(自身を除く): 33310040

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 75703, 151406, 302812, 378515, 529921, 605624, 757030, 1059842, 1514060, 2119684, 2649605, 3028120, 4239368, 5299210, 10598420, 21196840]

約数ペア:

[(1, 21196840), (2, 10598420), (4, 5299210), (5, 4239368), (7, 3028120), (8, 2649605), (10, 2119684), (14, 1514060), (20, 1059842), (28, 757030), (35, 605624), (40, 529921), (56, 378515), (70, 302812), (140, 151406), (280, 75703)]