20237980

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{107}}^1\times {\mathrm{193}}^1$

素因数の和:323

約数の個数: 72

約数和(自身を含む): 50159088

約数和(自身を除く): 29921108

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 70, 98, 107, 140, 193, 196, 214, 245, 386, 428, 490, 535, 749, 772, 965, 980, 1070, 1351, 1498, 1930, 2140, 2702, 2996, 3745, 3860, 5243, 5404, 6755, 7490, 9457, 10486, 13510, 14980, 18914, 20651, 20972, 26215, 27020, 37828, 41302, 47285, 52430, 82604, 94570, 103255, 104860, 144557, 189140, 206510, 289114, 413020, 578228, 722785, 1011899, 1445570, 2023798, 2891140, 4047596, 5059495, 10118990, 20237980]

約数ペア:

[(1, 20237980), (2, 10118990), (4, 5059495), (5, 4047596), (7, 2891140), (10, 2023798), (14, 1445570), (20, 1011899), (28, 722785), (35, 578228), (49, 413020), (70, 289114), (98, 206510), (107, 189140), (140, 144557), (193, 104860), (196, 103255), (214, 94570), (245, 82604), (386, 52430), (428, 47285), (490, 41302), (535, 37828), (749, 27020), (772, 26215), (965, 20972), (980, 20651), (1070, 18914), (1351, 14980), (1498, 13510), (1930, 10486), (2140, 9457), (2702, 7490), (2996, 6755), (3745, 5404), (3860, 5243)]