20487775

素因数分解:

$5^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{367}}^1$

素因数の和:424

約数の個数: 48

約数和(自身を含む): 32855040

約数和(自身を除く): 12367265

約数列:

[1, 5, 7, 11, 25, 29, 35, 55, 77, 145, 175, 203, 275, 319, 367, 385, 725, 1015, 1595, 1835, 1925, 2233, 2569, 4037, 5075, 7975, 9175, 10643, 11165, 12845, 20185, 28259, 53215, 55825, 64225, 74501, 100925, 117073, 141295, 266075, 372505, 585365, 706475, 819511, 1862525, 2926825, 4097555, 20487775]

約数ペア:

[(1, 20487775), (5, 4097555), (7, 2926825), (11, 1862525), (25, 819511), (29, 706475), (35, 585365), (55, 372505), (77, 266075), (145, 141295), (175, 117073), (203, 100925), (275, 74501), (319, 64225), (367, 55825), (385, 53215), (725, 28259), (1015, 20185), (1595, 12845), (1835, 11165), (1925, 10643), (2233, 9175), (2569, 7975), (4037, 5075)]