19887460

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{79}}^1\times {\mathrm{307}}^1$

素因数の和:436

約数の個数: 48

約数和(自身を含む): 43464960

約数和(自身を除く): 23577500

約数列:

[1, 2, 4, 5, 10, 20, 41, 79, 82, 158, 164, 205, 307, 316, 395, 410, 614, 790, 820, 1228, 1535, 1580, 3070, 3239, 6140, 6478, 12587, 12956, 16195, 24253, 25174, 32390, 48506, 50348, 62935, 64780, 97012, 121265, 125870, 242530, 251740, 485060, 994373, 1988746, 3977492, 4971865, 9943730, 19887460]

約数ペア:

[(1, 19887460), (2, 9943730), (4, 4971865), (5, 3977492), (10, 1988746), (20, 994373), (41, 485060), (79, 251740), (82, 242530), (158, 125870), (164, 121265), (205, 97012), (307, 64780), (316, 62935), (395, 50348), (410, 48506), (614, 32390), (790, 25174), (820, 24253), (1228, 16195), (1535, 12956), (1580, 12587), (3070, 6478), (3239, 6140)]