20474140

素因数分解:

$2^2\times 5^1\times {\mathrm{23}}^1\times {\mathrm{47}}^1\times {\mathrm{947}}^1$

素因数の和:1026

約数の個数: 48

約数和(自身を含む): 45868032

約数和(自身を除く): 25393892

約数列:

[1, 2, 4, 5, 10, 20, 23, 46, 47, 92, 94, 115, 188, 230, 235, 460, 470, 940, 947, 1081, 1894, 2162, 3788, 4324, 4735, 5405, 9470, 10810, 18940, 21620, 21781, 43562, 44509, 87124, 89018, 108905, 178036, 217810, 222545, 435620, 445090, 890180, 1023707, 2047414, 4094828, 5118535, 10237070, 20474140]

約数ペア:

[(1, 20474140), (2, 10237070), (4, 5118535), (5, 4094828), (10, 2047414), (20, 1023707), (23, 890180), (46, 445090), (47, 435620), (92, 222545), (94, 217810), (115, 178036), (188, 108905), (230, 89018), (235, 87124), (460, 44509), (470, 43562), (940, 21781), (947, 21620), (1081, 18940), (1894, 10810), (2162, 9470), (3788, 5405), (4324, 4735)]