20377815

素因数分解:

$3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{157}}^1\times {\mathrm{509}}^1$

素因数の和:691

約数の個数: 32

約数和(自身を含む): 34810560

約数和(自身を除く): 14432745

約数列:

[1, 3, 5, 15, 17, 51, 85, 157, 255, 471, 509, 785, 1527, 2355, 2545, 2669, 7635, 8007, 8653, 13345, 25959, 40035, 43265, 79913, 129795, 239739, 399565, 1198695, 1358521, 4075563, 6792605, 20377815]

約数ペア:

[(1, 20377815), (3, 6792605), (5, 4075563), (15, 1358521), (17, 1198695), (51, 399565), (85, 239739), (157, 129795), (255, 79913), (471, 43265), (509, 40035), (785, 25959), (1527, 13345), (2355, 8653), (2545, 8007), (2669, 7635)]