20776820

素因数分解:

$2^2\times 5^1\times {\mathrm{23}}^1\times {\mathrm{31}}^2\times {\mathrm{47}}^1$

素因数の和:141

約数の個数: 72

約数和(自身を含む): 48045312

約数和(自身を除く): 27268492

約数列:

[1, 2, 4, 5, 10, 20, 23, 31, 46, 47, 62, 92, 94, 115, 124, 155, 188, 230, 235, 310, 460, 470, 620, 713, 940, 961, 1081, 1426, 1457, 1922, 2162, 2852, 2914, 3565, 3844, 4324, 4805, 5405, 5828, 7130, 7285, 9610, 10810, 14260, 14570, 19220, 21620, 22103, 29140, 33511, 44206, 45167, 67022, 88412, 90334, 110515, 134044, 167555, 180668, 221030, 225835, 335110, 442060, 451670, 670220, 903340, 1038841, 2077682, 4155364, 5194205, 10388410, 20776820]

約数ペア:

[(1, 20776820), (2, 10388410), (4, 5194205), (5, 4155364), (10, 2077682), (20, 1038841), (23, 903340), (31, 670220), (46, 451670), (47, 442060), (62, 335110), (92, 225835), (94, 221030), (115, 180668), (124, 167555), (155, 134044), (188, 110515), (230, 90334), (235, 88412), (310, 67022), (460, 45167), (470, 44206), (620, 33511), (713, 29140), (940, 22103), (961, 21620), (1081, 19220), (1426, 14570), (1457, 14260), (1922, 10810), (2162, 9610), (2852, 7285), (2914, 7130), (3565, 5828), (3844, 5405), (4324, 4805)]