18874280

素因数分解:

$2^3\times 5^1\times {\mathrm{389}}^1\times {\mathrm{1213}}^1$

素因数の和:1613

約数の個数: 32

約数和(自身を含む): 42611400

約数和(自身を除く): 23737120

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 389, 778, 1213, 1556, 1945, 2426, 3112, 3890, 4852, 6065, 7780, 9704, 12130, 15560, 24260, 48520, 471857, 943714, 1887428, 2359285, 3774856, 4718570, 9437140, 18874280]

約数ペア:

[(1, 18874280), (2, 9437140), (4, 4718570), (5, 3774856), (8, 2359285), (10, 1887428), (20, 943714), (40, 471857), (389, 48520), (778, 24260), (1213, 15560), (1556, 12130), (1945, 9704), (2426, 7780), (3112, 6065), (3890, 4852)]