20900230

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^2\times {\mathrm{83}}^1\times {\mathrm{149}}^1$

素因数の和:265

約数の個数: 48

約数和(自身を含む): 41504400

約数和(自身を除く): 20604170

約数列:

[1, 2, 5, 10, 13, 26, 65, 83, 130, 149, 166, 169, 298, 338, 415, 745, 830, 845, 1079, 1490, 1690, 1937, 2158, 3874, 5395, 9685, 10790, 12367, 14027, 19370, 24734, 25181, 28054, 50362, 61835, 70135, 123670, 125905, 140270, 160771, 251810, 321542, 803855, 1607710, 2090023, 4180046, 10450115, 20900230]

約数ペア:

[(1, 20900230), (2, 10450115), (5, 4180046), (10, 2090023), (13, 1607710), (26, 803855), (65, 321542), (83, 251810), (130, 160771), (149, 140270), (166, 125905), (169, 123670), (298, 70135), (338, 61835), (415, 50362), (745, 28054), (830, 25181), (845, 24734), (1079, 19370), (1490, 14027), (1690, 12367), (1937, 10790), (2158, 9685), (3874, 5395)]