20720008

素因数分解:

$2^3\times {\mathrm{17}}^1\times {\mathrm{131}}^1\times {\mathrm{1163}}^1$

素因数の和:1317

約数の個数: 32

約数和(自身を含む): 41484960

約数和(自身を除く): 20764952

約数列:

[1, 2, 4, 8, 17, 34, 68, 131, 136, 262, 524, 1048, 1163, 2227, 2326, 4454, 4652, 8908, 9304, 17816, 19771, 39542, 79084, 152353, 158168, 304706, 609412, 1218824, 2590001, 5180002, 10360004, 20720008]

約数ペア:

[(1, 20720008), (2, 10360004), (4, 5180002), (8, 2590001), (17, 1218824), (34, 609412), (68, 304706), (131, 158168), (136, 152353), (262, 79084), (524, 39542), (1048, 19771), (1163, 17816), (2227, 9304), (2326, 8908), (4454, 4652)]