20339720

素因数分解:

$2^3\times 5^1\times {\mathrm{31}}^1\times {\mathrm{47}}^1\times {\mathrm{349}}^1$

素因数の和:438

約数の個数: 64

約数和(自身を含む): 48384000

約数和(自身を除く): 28044280

約数列:

[1, 2, 4, 5, 8, 10, 20, 31, 40, 47, 62, 94, 124, 155, 188, 235, 248, 310, 349, 376, 470, 620, 698, 940, 1240, 1396, 1457, 1745, 1880, 2792, 2914, 3490, 5828, 6980, 7285, 10819, 11656, 13960, 14570, 16403, 21638, 29140, 32806, 43276, 54095, 58280, 65612, 82015, 86552, 108190, 131224, 164030, 216380, 328060, 432760, 508493, 656120, 1016986, 2033972, 2542465, 4067944, 5084930, 10169860, 20339720]

約数ペア:

[(1, 20339720), (2, 10169860), (4, 5084930), (5, 4067944), (8, 2542465), (10, 2033972), (20, 1016986), (31, 656120), (40, 508493), (47, 432760), (62, 328060), (94, 216380), (124, 164030), (155, 131224), (188, 108190), (235, 86552), (248, 82015), (310, 65612), (349, 58280), (376, 54095), (470, 43276), (620, 32806), (698, 29140), (940, 21638), (1240, 16403), (1396, 14570), (1457, 13960), (1745, 11656), (1880, 10819), (2792, 7285), (2914, 6980), (3490, 5828)]