20535580

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{4157}}^1$

素因数の和:4198

約数の個数: 48

約数和(自身を含む): 48898080

約数和(自身を除く): 28362500

約数列:

[1, 2, 4, 5, 10, 13, 19, 20, 26, 38, 52, 65, 76, 95, 130, 190, 247, 260, 380, 494, 988, 1235, 2470, 4157, 4940, 8314, 16628, 20785, 41570, 54041, 78983, 83140, 108082, 157966, 216164, 270205, 315932, 394915, 540410, 789830, 1026779, 1080820, 1579660, 2053558, 4107116, 5133895, 10267790, 20535580]

約数ペア:

[(1, 20535580), (2, 10267790), (4, 5133895), (5, 4107116), (10, 2053558), (13, 1579660), (19, 1080820), (20, 1026779), (26, 789830), (38, 540410), (52, 394915), (65, 315932), (76, 270205), (95, 216164), (130, 157966), (190, 108082), (247, 83140), (260, 78983), (380, 54041), (494, 41570), (988, 20785), (1235, 16628), (2470, 8314), (4157, 4940)]