20429980

素因数分解:

$2^2\times 5^1\times {\mathrm{23}}^2\times {\mathrm{1931}}^1$

素因数の和:1986

約数の個数: 36

約数和(自身を含む): 44872632

約数和(自身を除く): 24442652

約数列:

[1, 2, 4, 5, 10, 20, 23, 46, 92, 115, 230, 460, 529, 1058, 1931, 2116, 2645, 3862, 5290, 7724, 9655, 10580, 19310, 38620, 44413, 88826, 177652, 222065, 444130, 888260, 1021499, 2042998, 4085996, 5107495, 10214990, 20429980]

約数ペア:

[(1, 20429980), (2, 10214990), (4, 5107495), (5, 4085996), (10, 2042998), (20, 1021499), (23, 888260), (46, 444130), (92, 222065), (115, 177652), (230, 88826), (460, 44413), (529, 38620), (1058, 19310), (1931, 10580), (2116, 9655), (2645, 7724), (3862, 5290)]