19815640

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{53}}^1\times {\mathrm{719}}^1$

素因数の和:796

約数の個数: 64

約数和(自身を含む): 48988800

約数和(自身を除く): 29173160

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 53, 65, 104, 106, 130, 212, 260, 265, 424, 520, 530, 689, 719, 1060, 1378, 1438, 2120, 2756, 2876, 3445, 3595, 5512, 5752, 6890, 7190, 9347, 13780, 14380, 18694, 27560, 28760, 37388, 38107, 46735, 74776, 76214, 93470, 152428, 186940, 190535, 304856, 373880, 381070, 495391, 762140, 990782, 1524280, 1981564, 2476955, 3963128, 4953910, 9907820, 19815640]

約数ペア:

[(1, 19815640), (2, 9907820), (4, 4953910), (5, 3963128), (8, 2476955), (10, 1981564), (13, 1524280), (20, 990782), (26, 762140), (40, 495391), (52, 381070), (53, 373880), (65, 304856), (104, 190535), (106, 186940), (130, 152428), (212, 93470), (260, 76214), (265, 74776), (424, 46735), (520, 38107), (530, 37388), (689, 28760), (719, 27560), (1060, 18694), (1378, 14380), (1438, 13780), (2120, 9347), (2756, 7190), (2876, 6890), (3445, 5752), (3595, 5512)]