20945360

素因数分解:

$2^4\times 5^1\times {\mathrm{17}}^1\times {\mathrm{15401}}^1$

素因数の和:15431

約数の個数: 40

約数和(自身を含む): 51565896

約数和(自身を除く): 30620536

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 34, 40, 68, 80, 85, 136, 170, 272, 340, 680, 1360, 15401, 30802, 61604, 77005, 123208, 154010, 246416, 261817, 308020, 523634, 616040, 1047268, 1232080, 1309085, 2094536, 2618170, 4189072, 5236340, 10472680, 20945360]

約数ペア:

[(1, 20945360), (2, 10472680), (4, 5236340), (5, 4189072), (8, 2618170), (10, 2094536), (16, 1309085), (17, 1232080), (20, 1047268), (34, 616040), (40, 523634), (68, 308020), (80, 261817), (85, 246416), (136, 154010), (170, 123208), (272, 77005), (340, 61604), (680, 30802), (1360, 15401)]