280919020

素因数分解:

$2^2\times 5^1\times {\mathrm{131}}^1\times {\mathrm{179}}^1\times {\mathrm{599}}^1$

素因数の和:918

約数の個数: 48

約数和(自身を含む): 598752000

約数和(自身を除く): 317832980

約数列:

[1, 2, 4, 5, 10, 20, 131, 179, 262, 358, 524, 599, 655, 716, 895, 1198, 1310, 1790, 2396, 2620, 2995, 3580, 5990, 11980, 23449, 46898, 78469, 93796, 107221, 117245, 156938, 214442, 234490, 313876, 392345, 428884, 468980, 536105, 784690, 1072210, 1569380, 2144420, 14045951, 28091902, 56183804, 70229755, 140459510, 280919020]

約数ペア:

[(1, 280919020), (2, 140459510), (4, 70229755), (5, 56183804), (10, 28091902), (20, 14045951), (131, 2144420), (179, 1569380), (262, 1072210), (358, 784690), (524, 536105), (599, 468980), (655, 428884), (716, 392345), (895, 313876), (1198, 234490), (1310, 214442), (1790, 156938), (2396, 117245), (2620, 107221), (2995, 93796), (3580, 78469), (5990, 46898), (11980, 23449)]