205398520

素因数分解:

$2^3\times 5^1\times {\mathrm{41}}^1\times {\mathrm{125243}}^1$

素因数の和:125295

約数の個数: 32

約数和(自身を含む): 473422320

約数和(自身を除く): 268023800

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 41, 82, 164, 205, 328, 410, 820, 1640, 125243, 250486, 500972, 626215, 1001944, 1252430, 2504860, 5009720, 5134963, 10269926, 20539852, 25674815, 41079704, 51349630, 102699260, 205398520]

約数ペア:

[(1, 205398520), (2, 102699260), (4, 51349630), (5, 41079704), (8, 25674815), (10, 20539852), (20, 10269926), (40, 5134963), (41, 5009720), (82, 2504860), (164, 1252430), (205, 1001944), (328, 626215), (410, 500972), (820, 250486), (1640, 125243)]