16581220

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{73}}^1\times {\mathrm{277}}^1$

素因数の和:400

約数の個数: 48

約数和(自身を含む): 36289008

約数和(自身を除く): 19707788

約数列:

[1, 2, 4, 5, 10, 20, 41, 73, 82, 146, 164, 205, 277, 292, 365, 410, 554, 730, 820, 1108, 1385, 1460, 2770, 2993, 5540, 5986, 11357, 11972, 14965, 20221, 22714, 29930, 40442, 45428, 56785, 59860, 80884, 101105, 113570, 202210, 227140, 404420, 829061, 1658122, 3316244, 4145305, 8290610, 16581220]

約数ペア:

[(1, 16581220), (2, 8290610), (4, 4145305), (5, 3316244), (10, 1658122), (20, 829061), (41, 404420), (73, 227140), (82, 202210), (146, 113570), (164, 101105), (205, 80884), (277, 59860), (292, 56785), (365, 45428), (410, 40442), (554, 29930), (730, 22714), (820, 20221), (1108, 14965), (1385, 11972), (1460, 11357), (2770, 5986), (2993, 5540)]