20717985

素因数分解:

$3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{113}}^1\times {\mathrm{719}}^1$

素因数の和:857

約数の個数: 32

約数和(自身を含む): 35458560

約数和(自身を除く): 14740575

約数列:

[1, 3, 5, 15, 17, 51, 85, 113, 255, 339, 565, 719, 1695, 1921, 2157, 3595, 5763, 9605, 10785, 12223, 28815, 36669, 61115, 81247, 183345, 243741, 406235, 1218705, 1381199, 4143597, 6905995, 20717985]

約数ペア:

[(1, 20717985), (3, 6905995), (5, 4143597), (15, 1381199), (17, 1218705), (51, 406235), (85, 243741), (113, 183345), (255, 81247), (339, 61115), (565, 36669), (719, 28815), (1695, 12223), (1921, 10785), (2157, 9605), (3595, 5763)]