30820520

素因数分解:

$2^3\times 5^1\times {\mathrm{41}}^1\times {\mathrm{18793}}^1$

素因数の和:18845

約数の個数: 32

約数和(自身を含む): 71041320

約数和(自身を除く): 40220800

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 41, 82, 164, 205, 328, 410, 820, 1640, 18793, 37586, 75172, 93965, 150344, 187930, 375860, 751720, 770513, 1541026, 3082052, 3852565, 6164104, 7705130, 15410260, 30820520]

約数ペア:

[(1, 30820520), (2, 15410260), (4, 7705130), (5, 6164104), (8, 3852565), (10, 3082052), (20, 1541026), (40, 770513), (41, 751720), (82, 375860), (164, 187930), (205, 150344), (328, 93965), (410, 75172), (820, 37586), (1640, 18793)]