129269720

素因数分解:

$2^3\times 5^1\times {\mathrm{41}}^1\times {\mathrm{78823}}^1$

素因数の和:78875

約数の個数: 32

約数和(自身を含む): 297954720

約数和(自身を除く): 168685000

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 41, 82, 164, 205, 328, 410, 820, 1640, 78823, 157646, 315292, 394115, 630584, 788230, 1576460, 3152920, 3231743, 6463486, 12926972, 16158715, 25853944, 32317430, 64634860, 129269720]

約数ペア:

[(1, 129269720), (2, 64634860), (4, 32317430), (5, 25853944), (8, 16158715), (10, 12926972), (20, 6463486), (40, 3231743), (41, 3152920), (82, 1576460), (164, 788230), (205, 630584), (328, 394115), (410, 315292), (820, 157646), (1640, 78823)]