21648340

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{101}}^1\times {\mathrm{1531}}^1$

素因数の和:1648

約数の個数: 48

約数和(自身を含む): 52504704

約数和(自身を除く): 30856364

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 101, 140, 202, 404, 505, 707, 1010, 1414, 1531, 2020, 2828, 3062, 3535, 6124, 7070, 7655, 10717, 14140, 15310, 21434, 30620, 42868, 53585, 107170, 154631, 214340, 309262, 618524, 773155, 1082417, 1546310, 2164834, 3092620, 4329668, 5412085, 10824170, 21648340]

約数ペア:

[(1, 21648340), (2, 10824170), (4, 5412085), (5, 4329668), (7, 3092620), (10, 2164834), (14, 1546310), (20, 1082417), (28, 773155), (35, 618524), (70, 309262), (101, 214340), (140, 154631), (202, 107170), (404, 53585), (505, 42868), (707, 30620), (1010, 21434), (1414, 15310), (1531, 14140), (2020, 10717), (2828, 7655), (3062, 7070), (3535, 6124)]