20618120

素因数分解:

$2^3\times 5^1\times {\mathrm{23}}^1\times {\mathrm{73}}^1\times {\mathrm{307}}^1$

素因数の和:414

約数の個数: 64

約数和(自身を含む): 49230720

約数和(自身を除く): 28612600

約数列:

[1, 2, 4, 5, 8, 10, 20, 23, 40, 46, 73, 92, 115, 146, 184, 230, 292, 307, 365, 460, 584, 614, 730, 920, 1228, 1460, 1535, 1679, 2456, 2920, 3070, 3358, 6140, 6716, 7061, 8395, 12280, 13432, 14122, 16790, 22411, 28244, 33580, 35305, 44822, 56488, 67160, 70610, 89644, 112055, 141220, 179288, 224110, 282440, 448220, 515453, 896440, 1030906, 2061812, 2577265, 4123624, 5154530, 10309060, 20618120]

約数ペア:

[(1, 20618120), (2, 10309060), (4, 5154530), (5, 4123624), (8, 2577265), (10, 2061812), (20, 1030906), (23, 896440), (40, 515453), (46, 448220), (73, 282440), (92, 224110), (115, 179288), (146, 141220), (184, 112055), (230, 89644), (292, 70610), (307, 67160), (365, 56488), (460, 44822), (584, 35305), (614, 33580), (730, 28244), (920, 22411), (1228, 16790), (1460, 14122), (1535, 13432), (1679, 12280), (2456, 8395), (2920, 7061), (3070, 6716), (3358, 6140)]