201778840

素因数分解:

$2^3\times 5^1\times {\mathrm{1979}}^1\times {\mathrm{2549}}^1$

素因数の和:4539

約数の個数: 32

約数和(自身を含む): 454410000

約数和(自身を除く): 252631160

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 1979, 2549, 3958, 5098, 7916, 9895, 10196, 12745, 15832, 19790, 20392, 25490, 39580, 50980, 79160, 101960, 5044471, 10088942, 20177884, 25222355, 40355768, 50444710, 100889420, 201778840]

約数ペア:

[(1, 201778840), (2, 100889420), (4, 50444710), (5, 40355768), (8, 25222355), (10, 20177884), (20, 10088942), (40, 5044471), (1979, 101960), (2549, 79160), (3958, 50980), (5098, 39580), (7916, 25490), (9895, 20392), (10196, 19790), (12745, 15832)]