20994680

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{97}}^1\times {\mathrm{773}}^1$

素因数の和:888

約数の個数: 64

約数和(自身を含む): 54613440

約数和(自身を除く): 33618760

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 97, 140, 194, 280, 388, 485, 679, 773, 776, 970, 1358, 1546, 1940, 2716, 3092, 3395, 3865, 3880, 5411, 5432, 6184, 6790, 7730, 10822, 13580, 15460, 21644, 27055, 27160, 30920, 43288, 54110, 74981, 108220, 149962, 216440, 299924, 374905, 524867, 599848, 749810, 1049734, 1499620, 2099468, 2624335, 2999240, 4198936, 5248670, 10497340, 20994680]

約数ペア:

[(1, 20994680), (2, 10497340), (4, 5248670), (5, 4198936), (7, 2999240), (8, 2624335), (10, 2099468), (14, 1499620), (20, 1049734), (28, 749810), (35, 599848), (40, 524867), (56, 374905), (70, 299924), (97, 216440), (140, 149962), (194, 108220), (280, 74981), (388, 54110), (485, 43288), (679, 30920), (773, 27160), (776, 27055), (970, 21644), (1358, 15460), (1546, 13580), (1940, 10822), (2716, 7730), (3092, 6790), (3395, 6184), (3865, 5432), (3880, 5411)]