81453880

素因数分解:

$2^3\times 5^1\times {\mathrm{41}}^1\times {\mathrm{49667}}^1$

素因数の和:49719

約数の個数: 32

約数和(自身を含む): 187745040

約数和(自身を除く): 106291160

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 41, 82, 164, 205, 328, 410, 820, 1640, 49667, 99334, 198668, 248335, 397336, 496670, 993340, 1986680, 2036347, 4072694, 8145388, 10181735, 16290776, 20363470, 40726940, 81453880]

約数ペア:

[(1, 81453880), (2, 40726940), (4, 20363470), (5, 16290776), (8, 10181735), (10, 8145388), (20, 4072694), (40, 2036347), (41, 1986680), (82, 993340), (164, 496670), (205, 397336), (328, 248335), (410, 198668), (820, 99334), (1640, 49667)]