19720876

素因数分解:

$2^2\times 7^1\times {\mathrm{53}}^1\times {\mathrm{97}}^1\times {\mathrm{137}}^1$

素因数の和:298

約数の個数: 48

約数和(自身を含む): 40896576

約数和(自身を除く): 21175700

約数列:

[1, 2, 4, 7, 14, 28, 53, 97, 106, 137, 194, 212, 274, 371, 388, 548, 679, 742, 959, 1358, 1484, 1918, 2716, 3836, 5141, 7261, 10282, 13289, 14522, 20564, 26578, 29044, 35987, 50827, 53156, 71974, 93023, 101654, 143948, 186046, 203308, 372092, 704317, 1408634, 2817268, 4930219, 9860438, 19720876]

約数ペア:

[(1, 19720876), (2, 9860438), (4, 4930219), (7, 2817268), (14, 1408634), (28, 704317), (53, 372092), (97, 203308), (106, 186046), (137, 143948), (194, 101654), (212, 93023), (274, 71974), (371, 53156), (388, 50827), (548, 35987), (679, 29044), (742, 26578), (959, 20564), (1358, 14522), (1484, 13289), (1918, 10282), (2716, 7261), (3836, 5141)]