18787240

素因数分解:

$2^3\times 5^1\times {\mathrm{31}}^1\times {\mathrm{109}}^1\times {\mathrm{139}}^1$

素因数の和:290

約数の個数: 64

約数和(自身を含む): 44352000

約数和(自身を除く): 25564760

約数列:

[1, 2, 4, 5, 8, 10, 20, 31, 40, 62, 109, 124, 139, 155, 218, 248, 278, 310, 436, 545, 556, 620, 695, 872, 1090, 1112, 1240, 1390, 2180, 2780, 3379, 4309, 4360, 5560, 6758, 8618, 13516, 15151, 16895, 17236, 21545, 27032, 30302, 33790, 34472, 43090, 60604, 67580, 75755, 86180, 121208, 135160, 151510, 172360, 303020, 469681, 606040, 939362, 1878724, 2348405, 3757448, 4696810, 9393620, 18787240]

約数ペア:

[(1, 18787240), (2, 9393620), (4, 4696810), (5, 3757448), (8, 2348405), (10, 1878724), (20, 939362), (31, 606040), (40, 469681), (62, 303020), (109, 172360), (124, 151510), (139, 135160), (155, 121208), (218, 86180), (248, 75755), (278, 67580), (310, 60604), (436, 43090), (545, 34472), (556, 33790), (620, 30302), (695, 27032), (872, 21545), (1090, 17236), (1112, 16895), (1240, 15151), (1390, 13516), (2180, 8618), (2780, 6758), (3379, 5560), (4309, 4360)]