19972820

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{179}}^1\times {\mathrm{797}}^1$

素因数の和:992

約数の個数: 48

約数和(自身を含む): 48263040

約数和(自身を除く): 28290220

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 179, 358, 716, 797, 895, 1253, 1594, 1790, 2506, 3188, 3580, 3985, 5012, 5579, 6265, 7970, 11158, 12530, 15940, 22316, 25060, 27895, 55790, 111580, 142663, 285326, 570652, 713315, 998641, 1426630, 1997282, 2853260, 3994564, 4993205, 9986410, 19972820]

約数ペア:

[(1, 19972820), (2, 9986410), (4, 4993205), (5, 3994564), (7, 2853260), (10, 1997282), (14, 1426630), (20, 998641), (28, 713315), (35, 570652), (70, 285326), (140, 142663), (179, 111580), (358, 55790), (716, 27895), (797, 25060), (895, 22316), (1253, 15940), (1594, 12530), (1790, 11158), (2506, 7970), (3188, 6265), (3580, 5579), (3985, 5012)]