20868940

素因数分解:

$2^2\times 5^1\times {\mathrm{47}}^1\times {\mathrm{149}}^2$

素因数の和:354

約数の個数: 36

約数和(自身を含む): 45059616

約数和(自身を除く): 24190676

約数列:

[1, 2, 4, 5, 10, 20, 47, 94, 149, 188, 235, 298, 470, 596, 745, 940, 1490, 2980, 7003, 14006, 22201, 28012, 35015, 44402, 70030, 88804, 111005, 140060, 222010, 444020, 1043447, 2086894, 4173788, 5217235, 10434470, 20868940]

約数ペア:

[(1, 20868940), (2, 10434470), (4, 5217235), (5, 4173788), (10, 2086894), (20, 1043447), (47, 444020), (94, 222010), (149, 140060), (188, 111005), (235, 88804), (298, 70030), (470, 44402), (596, 35015), (745, 28012), (940, 22201), (1490, 14006), (2980, 7003)]