20437040

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{457}}^1$

素因数の和:526

約数の個数: 80

約数和(自身を含む): 52475808

約数和(自身を除く): 32038768

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 43, 52, 65, 80, 86, 104, 130, 172, 208, 215, 260, 344, 430, 457, 520, 559, 688, 860, 914, 1040, 1118, 1720, 1828, 2236, 2285, 2795, 3440, 3656, 4472, 4570, 5590, 5941, 7312, 8944, 9140, 11180, 11882, 18280, 19651, 22360, 23764, 29705, 36560, 39302, 44720, 47528, 59410, 78604, 95056, 98255, 118820, 157208, 196510, 237640, 255463, 314416, 393020, 475280, 510926, 786040, 1021852, 1277315, 1572080, 2043704, 2554630, 4087408, 5109260, 10218520, 20437040]

約数ペア:

[(1, 20437040), (2, 10218520), (4, 5109260), (5, 4087408), (8, 2554630), (10, 2043704), (13, 1572080), (16, 1277315), (20, 1021852), (26, 786040), (40, 510926), (43, 475280), (52, 393020), (65, 314416), (80, 255463), (86, 237640), (104, 196510), (130, 157208), (172, 118820), (208, 98255), (215, 95056), (260, 78604), (344, 59410), (430, 47528), (457, 44720), (520, 39302), (559, 36560), (688, 29705), (860, 23764), (914, 22360), (1040, 19651), (1118, 18280), (1720, 11882), (1828, 11180), (2236, 9140), (2285, 8944), (2795, 7312), (3440, 5941), (3656, 5590), (4472, 4570)]