205120180

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{330839}}^1$

素因数の和:330879

約数の個数: 24

約数和(自身を含む): 444648960

約数和(自身を除く): 239528780

約数列:

[1, 2, 4, 5, 10, 20, 31, 62, 124, 155, 310, 620, 330839, 661678, 1323356, 1654195, 3308390, 6616780, 10256009, 20512018, 41024036, 51280045, 102560090, 205120180]

約数ペア:

[(1, 205120180), (2, 102560090), (4, 51280045), (5, 41024036), (10, 20512018), (20, 10256009), (31, 6616780), (62, 3308390), (124, 1654195), (155, 1323356), (310, 661678), (620, 330839)]