18550780

素因数分解:

$2^2\times 5^1\times {\mathrm{59}}^1\times {\mathrm{79}}^1\times {\mathrm{199}}^1$

素因数の和:346

約数の個数: 48

約数和(自身を含む): 40320000

約数和(自身を除く): 21769220

約数列:

[1, 2, 4, 5, 10, 20, 59, 79, 118, 158, 199, 236, 295, 316, 395, 398, 590, 790, 796, 995, 1180, 1580, 1990, 3980, 4661, 9322, 11741, 15721, 18644, 23305, 23482, 31442, 46610, 46964, 58705, 62884, 78605, 93220, 117410, 157210, 234820, 314420, 927539, 1855078, 3710156, 4637695, 9275390, 18550780]

約数ペア:

[(1, 18550780), (2, 9275390), (4, 4637695), (5, 3710156), (10, 1855078), (20, 927539), (59, 314420), (79, 234820), (118, 157210), (158, 117410), (199, 93220), (236, 78605), (295, 62884), (316, 58705), (395, 46964), (398, 46610), (590, 31442), (790, 23482), (796, 23305), (995, 18644), (1180, 15721), (1580, 11741), (1990, 9322), (3980, 4661)]