20739310

素因数分解:

$2^1\times 5^1\times {\mathrm{31}}^1\times {\mathrm{149}}^1\times {\mathrm{449}}^1$

素因数の和:636

約数の個数: 32

約数和(自身を含む): 38880000

約数和(自身を除く): 18140690

約数列:

[1, 2, 5, 10, 31, 62, 149, 155, 298, 310, 449, 745, 898, 1490, 2245, 4490, 4619, 9238, 13919, 23095, 27838, 46190, 66901, 69595, 133802, 139190, 334505, 669010, 2073931, 4147862, 10369655, 20739310]

約数ペア:

[(1, 20739310), (2, 10369655), (5, 4147862), (10, 2073931), (31, 669010), (62, 334505), (149, 139190), (155, 133802), (298, 69595), (310, 66901), (449, 46190), (745, 27838), (898, 23095), (1490, 13919), (2245, 9238), (4490, 4619)]