21637940

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{2767}}^1$

素因数の和:2816

約数の個数: 48

約数和(自身を含む): 50222592

約数和(自身を除く): 28584652

約数列:

[1, 2, 4, 5, 10, 17, 20, 23, 34, 46, 68, 85, 92, 115, 170, 230, 340, 391, 460, 782, 1564, 1955, 2767, 3910, 5534, 7820, 11068, 13835, 27670, 47039, 55340, 63641, 94078, 127282, 188156, 235195, 254564, 318205, 470390, 636410, 940780, 1081897, 1272820, 2163794, 4327588, 5409485, 10818970, 21637940]

約数ペア:

[(1, 21637940), (2, 10818970), (4, 5409485), (5, 4327588), (10, 2163794), (17, 1272820), (20, 1081897), (23, 940780), (34, 636410), (46, 470390), (68, 318205), (85, 254564), (92, 235195), (115, 188156), (170, 127282), (230, 94078), (340, 63641), (391, 55340), (460, 47039), (782, 27670), (1564, 13835), (1955, 11068), (2767, 7820), (3910, 5534)]