289722520

素因数分解:

$2^3\times 5^1\times {\mathrm{103}}^1\times {\mathrm{70321}}^1$

素因数の和:70435

約数の個数: 32

約数和(自身を含む): 658213920

約数和(自身を除く): 368491400

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 103, 206, 412, 515, 824, 1030, 2060, 4120, 70321, 140642, 281284, 351605, 562568, 703210, 1406420, 2812840, 7243063, 14486126, 28972252, 36215315, 57944504, 72430630, 144861260, 289722520]

約数ペア:

[(1, 289722520), (2, 144861260), (4, 72430630), (5, 57944504), (8, 36215315), (10, 28972252), (20, 14486126), (40, 7243063), (103, 2812840), (206, 1406420), (412, 703210), (515, 562568), (824, 351605), (1030, 281284), (2060, 140642), (4120, 70321)]