21086984

素因数分解:

$2^3\times {\mathrm{103}}^1\times {\mathrm{157}}^1\times {\mathrm{163}}^1$

素因数の和:429

約数の個数: 32

約数和(自身を含む): 40422720

約数和(自身を除く): 19335736

約数列:

[1, 2, 4, 8, 103, 157, 163, 206, 314, 326, 412, 628, 652, 824, 1256, 1304, 16171, 16789, 25591, 32342, 33578, 51182, 64684, 67156, 102364, 129368, 134312, 204728, 2635873, 5271746, 10543492, 21086984]

約数ペア:

[(1, 21086984), (2, 10543492), (4, 5271746), (8, 2635873), (103, 204728), (157, 134312), (163, 129368), (206, 102364), (314, 67156), (326, 64684), (412, 51182), (628, 33578), (652, 32342), (824, 25591), (1256, 16789), (1304, 16171)]