19989004

素因数分解:

$2^2\times 7^1\times {\mathrm{29}}^1\times {\mathrm{103}}^1\times {\mathrm{239}}^1$

素因数の和:382

約数の個数: 48

約数和(自身を含む): 41932800

約数和(自身を除く): 21943796

約数列:

[1, 2, 4, 7, 14, 28, 29, 58, 103, 116, 203, 206, 239, 406, 412, 478, 721, 812, 956, 1442, 1673, 2884, 2987, 3346, 5974, 6692, 6931, 11948, 13862, 20909, 24617, 27724, 41818, 48517, 49234, 83636, 97034, 98468, 172319, 194068, 344638, 689276, 713893, 1427786, 2855572, 4997251, 9994502, 19989004]

約数ペア:

[(1, 19989004), (2, 9994502), (4, 4997251), (7, 2855572), (14, 1427786), (28, 713893), (29, 689276), (58, 344638), (103, 194068), (116, 172319), (203, 98468), (206, 97034), (239, 83636), (406, 49234), (412, 48517), (478, 41818), (721, 27724), (812, 24617), (956, 20909), (1442, 13862), (1673, 11948), (2884, 6931), (2987, 6692), (3346, 5974)]