80180420

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{277}}^1\times {\mathrm{353}}^1$

素因数の和:680

約数の個数: 48

約数和(自身を含む): 173598768

約数和(自身を除く): 93418348

約数列:

[1, 2, 4, 5, 10, 20, 41, 82, 164, 205, 277, 353, 410, 554, 706, 820, 1108, 1385, 1412, 1765, 2770, 3530, 5540, 7060, 11357, 14473, 22714, 28946, 45428, 56785, 57892, 72365, 97781, 113570, 144730, 195562, 227140, 289460, 391124, 488905, 977810, 1955620, 4009021, 8018042, 16036084, 20045105, 40090210, 80180420]

約数ペア:

[(1, 80180420), (2, 40090210), (4, 20045105), (5, 16036084), (10, 8018042), (20, 4009021), (41, 1955620), (82, 977810), (164, 488905), (205, 391124), (277, 289460), (353, 227140), (410, 195562), (554, 144730), (706, 113570), (820, 97781), (1108, 72365), (1385, 57892), (1412, 56785), (1765, 45428), (2770, 28946), (3530, 22714), (5540, 14473), (7060, 11357)]