205504520

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{395201}}^1$

素因数の和:395225

約数の個数: 32

約数和(自身を含む): 497954520

約数和(自身を除く): 292450000

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 260, 520, 395201, 790402, 1580804, 1976005, 3161608, 3952010, 5137613, 7904020, 10275226, 15808040, 20550452, 25688065, 41100904, 51376130, 102752260, 205504520]

約数ペア:

[(1, 205504520), (2, 102752260), (4, 51376130), (5, 41100904), (8, 25688065), (10, 20550452), (13, 15808040), (20, 10275226), (26, 7904020), (40, 5137613), (52, 3952010), (65, 3161608), (104, 1976005), (130, 1580804), (260, 790402), (520, 395201)]