278311480

素因数分解:

$2^3\times 5^1\times {\mathrm{43}}^2\times {\mathrm{53}}^1\times {\mathrm{71}}^1$

素因数の和:221

約数の個数: 96

約数和(自身を含む): 662398560

約数和(自身を除く): 384087080

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 43, 53, 71, 86, 106, 142, 172, 212, 215, 265, 284, 344, 355, 424, 430, 530, 568, 710, 860, 1060, 1420, 1720, 1849, 2120, 2279, 2840, 3053, 3698, 3763, 4558, 6106, 7396, 7526, 9116, 9245, 11395, 12212, 14792, 15052, 15265, 18232, 18490, 18815, 22790, 24424, 30104, 30530, 36980, 37630, 45580, 61060, 73960, 75260, 91160, 97997, 122120, 131279, 150520, 161809, 195994, 262558, 323618, 391988, 489985, 525116, 647236, 656395, 783976, 809045, 979970, 1050232, 1294472, 1312790, 1618090, 1959940, 2625580, 3236180, 3919880, 5251160, 6472360, 6957787, 13915574, 27831148, 34788935, 55662296, 69577870, 139155740, 278311480]

約数ペア:

[(1, 278311480), (2, 139155740), (4, 69577870), (5, 55662296), (8, 34788935), (10, 27831148), (20, 13915574), (40, 6957787), (43, 6472360), (53, 5251160), (71, 3919880), (86, 3236180), (106, 2625580), (142, 1959940), (172, 1618090), (212, 1312790), (215, 1294472), (265, 1050232), (284, 979970), (344, 809045), (355, 783976), (424, 656395), (430, 647236), (530, 525116), (568, 489985), (710, 391988), (860, 323618), (1060, 262558), (1420, 195994), (1720, 161809), (1849, 150520), (2120, 131279), (2279, 122120), (2840, 97997), (3053, 91160), (3698, 75260), (3763, 73960), (4558, 61060), (6106, 45580), (7396, 37630), (7526, 36980), (9116, 30530), (9245, 30104), (11395, 24424), (12212, 22790), (14792, 18815), (15052, 18490), (15265, 18232)]