1638528040

素因数分解:

$2^3\times 5^1\times {\mathrm{2089}}^1\times {\mathrm{19609}}^1$

素因数の和:21709

約数の個数: 32

約数和(自身を含む): 3688641000

約数和(自身を除く): 2050112960

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 2089, 4178, 8356, 10445, 16712, 19609, 20890, 39218, 41780, 78436, 83560, 98045, 156872, 196090, 392180, 784360, 40963201, 81926402, 163852804, 204816005, 327705608, 409632010, 819264020, 1638528040]

約数ペア:

[(1, 1638528040), (2, 819264020), (4, 409632010), (5, 327705608), (8, 204816005), (10, 163852804), (20, 81926402), (40, 40963201), (2089, 784360), (4178, 392180), (8356, 196090), (10445, 156872), (16712, 98045), (19609, 83560), (20890, 78436), (39218, 41780)]