21221708

素因数分解:

$2^2\times {\mathrm{19}}^1\times {\mathrm{103}}^1\times {\mathrm{2711}}^1$

素因数の和:2837

約数の個数: 24

約数和(自身を含む): 39486720

約数和(自身を除く): 18265012

約数列:

[1, 2, 4, 19, 38, 76, 103, 206, 412, 1957, 2711, 3914, 5422, 7828, 10844, 51509, 103018, 206036, 279233, 558466, 1116932, 5305427, 10610854, 21221708]

約数ペア:

[(1, 21221708), (2, 10610854), (4, 5305427), (19, 1116932), (38, 558466), (76, 279233), (103, 206036), (206, 103018), (412, 51509), (1957, 10844), (2711, 7828), (3914, 5422)]