20764120

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{73}}^1\times {\mathrm{547}}^1$

素因数の和:644

約数の個数: 64

約数和(自身を含む): 51095520

約数和(自身を除く): 30331400

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 73, 104, 130, 146, 260, 292, 365, 520, 547, 584, 730, 949, 1094, 1460, 1898, 2188, 2735, 2920, 3796, 4376, 4745, 5470, 7111, 7592, 9490, 10940, 14222, 18980, 21880, 28444, 35555, 37960, 39931, 56888, 71110, 79862, 142220, 159724, 199655, 284440, 319448, 399310, 519103, 798620, 1038206, 1597240, 2076412, 2595515, 4152824, 5191030, 10382060, 20764120]

約数ペア:

[(1, 20764120), (2, 10382060), (4, 5191030), (5, 4152824), (8, 2595515), (10, 2076412), (13, 1597240), (20, 1038206), (26, 798620), (40, 519103), (52, 399310), (65, 319448), (73, 284440), (104, 199655), (130, 159724), (146, 142220), (260, 79862), (292, 71110), (365, 56888), (520, 39931), (547, 37960), (584, 35555), (730, 28444), (949, 21880), (1094, 18980), (1460, 14222), (1898, 10940), (2188, 9490), (2735, 7592), (2920, 7111), (3796, 5470), (4376, 4745)]