128987120

素因数分解:

$2^4\times 5^1\times {\mathrm{71}}^1\times {\mathrm{22709}}^1$

素因数の和:22793

約数の個数: 40

約数和(自身を含む): 304132320

約数和(自身を除く): 175145200

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 71, 80, 142, 284, 355, 568, 710, 1136, 1420, 2840, 5680, 22709, 45418, 90836, 113545, 181672, 227090, 363344, 454180, 908360, 1612339, 1816720, 3224678, 6449356, 8061695, 12898712, 16123390, 25797424, 32246780, 64493560, 128987120]

約数ペア:

[(1, 128987120), (2, 64493560), (4, 32246780), (5, 25797424), (8, 16123390), (10, 12898712), (16, 8061695), (20, 6449356), (40, 3224678), (71, 1816720), (80, 1612339), (142, 908360), (284, 454180), (355, 363344), (568, 227090), (710, 181672), (1136, 113545), (1420, 90836), (2840, 45418), (5680, 22709)]