19944040

素因数分解:

$2^3\times 5^1\times {\mathrm{41}}^1\times {\mathrm{12161}}^1$

素因数の和:12213

約数の個数: 32

約数和(自身を含む): 45972360

約数和(自身を除く): 26028320

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 41, 82, 164, 205, 328, 410, 820, 1640, 12161, 24322, 48644, 60805, 97288, 121610, 243220, 486440, 498601, 997202, 1994404, 2493005, 3988808, 4986010, 9972020, 19944040]

約数ペア:

[(1, 19944040), (2, 9972020), (4, 4986010), (5, 3988808), (8, 2493005), (10, 1994404), (20, 997202), (40, 498601), (41, 486440), (82, 243220), (164, 121610), (205, 97288), (328, 60805), (410, 48644), (820, 24322), (1640, 12161)]