20161870

素因数分解:

$2^1\times 5^1\times {\mathrm{71}}^1\times {\mathrm{73}}^1\times {\mathrm{389}}^1$

素因数の和:540

約数の個数: 32

約数和(自身を含む): 37402560

約数和(自身を除く): 17240690

約数列:

[1, 2, 5, 10, 71, 73, 142, 146, 355, 365, 389, 710, 730, 778, 1945, 3890, 5183, 10366, 25915, 27619, 28397, 51830, 55238, 56794, 138095, 141985, 276190, 283970, 2016187, 4032374, 10080935, 20161870]

約数ペア:

[(1, 20161870), (2, 10080935), (5, 4032374), (10, 2016187), (71, 283970), (73, 276190), (142, 141985), (146, 138095), (355, 56794), (365, 55238), (389, 51830), (710, 28397), (730, 27619), (778, 25915), (1945, 10366), (3890, 5183)]