20409160

素因数分解:

$2^3\times 5^1\times {\mathrm{31}}^1\times {\mathrm{109}}^1\times {\mathrm{151}}^1$

素因数の和:302

約数の個数: 64

約数和(自身を含む): 48153600

約数和(自身を除く): 27744440

約数列:

[1, 2, 4, 5, 8, 10, 20, 31, 40, 62, 109, 124, 151, 155, 218, 248, 302, 310, 436, 545, 604, 620, 755, 872, 1090, 1208, 1240, 1510, 2180, 3020, 3379, 4360, 4681, 6040, 6758, 9362, 13516, 16459, 16895, 18724, 23405, 27032, 32918, 33790, 37448, 46810, 65836, 67580, 82295, 93620, 131672, 135160, 164590, 187240, 329180, 510229, 658360, 1020458, 2040916, 2551145, 4081832, 5102290, 10204580, 20409160]

約数ペア:

[(1, 20409160), (2, 10204580), (4, 5102290), (5, 4081832), (8, 2551145), (10, 2040916), (20, 1020458), (31, 658360), (40, 510229), (62, 329180), (109, 187240), (124, 164590), (151, 135160), (155, 131672), (218, 93620), (248, 82295), (302, 67580), (310, 65836), (436, 46810), (545, 37448), (604, 33790), (620, 32918), (755, 27032), (872, 23405), (1090, 18724), (1208, 16895), (1240, 16459), (1510, 13516), (2180, 9362), (3020, 6758), (3379, 6040), (4360, 4681)]