20218460

素因数分解:

$2^2\times 5^1\times {\mathrm{47}}^1\times {\mathrm{137}}^1\times {\mathrm{157}}^1$

素因数の和:350

約数の個数: 48

約数和(自身を含む): 43956864

約数和(自身を除く): 23738404

約数列:

[1, 2, 4, 5, 10, 20, 47, 94, 137, 157, 188, 235, 274, 314, 470, 548, 628, 685, 785, 940, 1370, 1570, 2740, 3140, 6439, 7379, 12878, 14758, 21509, 25756, 29516, 32195, 36895, 43018, 64390, 73790, 86036, 107545, 128780, 147580, 215090, 430180, 1010923, 2021846, 4043692, 5054615, 10109230, 20218460]

約数ペア:

[(1, 20218460), (2, 10109230), (4, 5054615), (5, 4043692), (10, 2021846), (20, 1010923), (47, 430180), (94, 215090), (137, 147580), (157, 128780), (188, 107545), (235, 86036), (274, 73790), (314, 64390), (470, 43018), (548, 36895), (628, 32195), (685, 29516), (785, 25756), (940, 21509), (1370, 14758), (1570, 12878), (2740, 7379), (3140, 6439)]