20112920

素因数分解:

$2^3\times 5^1\times {\mathrm{61}}^1\times {\mathrm{8243}}^1$

素因数の和:8315

約数の個数: 32

約数和(自身を含む): 46001520

約数和(自身を除く): 25888600

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 61, 122, 244, 305, 488, 610, 1220, 2440, 8243, 16486, 32972, 41215, 65944, 82430, 164860, 329720, 502823, 1005646, 2011292, 2514115, 4022584, 5028230, 10056460, 20112920]

約数ペア:

[(1, 20112920), (2, 10056460), (4, 5028230), (5, 4022584), (8, 2514115), (10, 2011292), (20, 1005646), (40, 502823), (61, 329720), (122, 164860), (244, 82430), (305, 65944), (488, 41215), (610, 32972), (1220, 16486), (2440, 8243)]