20334640

素因数分解:

$2^4\times 5^1\times {\mathrm{157}}^1\times {\mathrm{1619}}^1$

素因数の和:1789

約数の個数: 40

約数和(自身を含む): 47608560

約数和(自身を除く): 27273920

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 157, 314, 628, 785, 1256, 1570, 1619, 2512, 3140, 3238, 6280, 6476, 8095, 12560, 12952, 16190, 25904, 32380, 64760, 129520, 254183, 508366, 1016732, 1270915, 2033464, 2541830, 4066928, 5083660, 10167320, 20334640]

約数ペア:

[(1, 20334640), (2, 10167320), (4, 5083660), (5, 4066928), (8, 2541830), (10, 2033464), (16, 1270915), (20, 1016732), (40, 508366), (80, 254183), (157, 129520), (314, 64760), (628, 32380), (785, 25904), (1256, 16190), (1570, 12952), (1619, 12560), (2512, 8095), (3140, 6476), (3238, 6280)]