20281720

素因数分解:

$2^3\times 5^1\times {\mathrm{433}}^1\times {\mathrm{1171}}^1$

素因数の和:1615

約数の個数: 32

約数和(自身を含む): 45778320

約数和(自身を除く): 25496600

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 433, 866, 1171, 1732, 2165, 2342, 3464, 4330, 4684, 5855, 8660, 9368, 11710, 17320, 23420, 46840, 507043, 1014086, 2028172, 2535215, 4056344, 5070430, 10140860, 20281720]

約数ペア:

[(1, 20281720), (2, 10140860), (4, 5070430), (5, 4056344), (8, 2535215), (10, 2028172), (20, 1014086), (40, 507043), (433, 46840), (866, 23420), (1171, 17320), (1732, 11710), (2165, 9368), (2342, 8660), (3464, 5855), (4330, 4684)]