20806440

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{83}}^1\times {\mathrm{2089}}^1$

素因数の和:2186

約数の個数: 64

約数和(自身を含む): 63201600

約数和(自身を除く): 42395160

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 20, 24, 30, 40, 60, 83, 120, 166, 249, 332, 415, 498, 664, 830, 996, 1245, 1660, 1992, 2089, 2490, 3320, 4178, 4980, 6267, 8356, 9960, 10445, 12534, 16712, 20890, 25068, 31335, 41780, 50136, 62670, 83560, 125340, 173387, 250680, 346774, 520161, 693548, 866935, 1040322, 1387096, 1733870, 2080644, 2600805, 3467740, 4161288, 5201610, 6935480, 10403220, 20806440]

約数ペア:

[(1, 20806440), (2, 10403220), (3, 6935480), (4, 5201610), (5, 4161288), (6, 3467740), (8, 2600805), (10, 2080644), (12, 1733870), (15, 1387096), (20, 1040322), (24, 866935), (30, 693548), (40, 520161), (60, 346774), (83, 250680), (120, 173387), (166, 125340), (249, 83560), (332, 62670), (415, 50136), (498, 41780), (664, 31335), (830, 25068), (996, 20890), (1245, 16712), (1660, 12534), (1992, 10445), (2089, 9960), (2490, 8356), (3320, 6267), (4178, 4980)]