21976580

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{109}}^1\times {\mathrm{593}}^1$

素因数の和:728

約数の個数: 48

約数和(自身を含む): 49397040

約数和(自身を除く): 27420460

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 68, 85, 109, 170, 218, 340, 436, 545, 593, 1090, 1186, 1853, 2180, 2372, 2965, 3706, 5930, 7412, 9265, 10081, 11860, 18530, 20162, 37060, 40324, 50405, 64637, 100810, 129274, 201620, 258548, 323185, 646370, 1098829, 1292740, 2197658, 4395316, 5494145, 10988290, 21976580]

約数ペア:

[(1, 21976580), (2, 10988290), (4, 5494145), (5, 4395316), (10, 2197658), (17, 1292740), (20, 1098829), (34, 646370), (68, 323185), (85, 258548), (109, 201620), (170, 129274), (218, 100810), (340, 64637), (436, 50405), (545, 40324), (593, 37060), (1090, 20162), (1186, 18530), (1853, 11860), (2180, 10081), (2372, 9265), (2965, 7412), (3706, 5930)]