20681840

素因数分解:

$2^4\times 5^1\times {\mathrm{419}}^1\times {\mathrm{617}}^1$

素因数の和:1049

約数の個数: 40

約数和(自身を含む): 48278160

約数和(自身を除く): 27596320

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 419, 617, 838, 1234, 1676, 2095, 2468, 3085, 3352, 4190, 4936, 6170, 6704, 8380, 9872, 12340, 16760, 24680, 33520, 49360, 258523, 517046, 1034092, 1292615, 2068184, 2585230, 4136368, 5170460, 10340920, 20681840]

約数ペア:

[(1, 20681840), (2, 10340920), (4, 5170460), (5, 4136368), (8, 2585230), (10, 2068184), (16, 1292615), (20, 1034092), (40, 517046), (80, 258523), (419, 49360), (617, 33520), (838, 24680), (1234, 16760), (1676, 12340), (2095, 9872), (2468, 8380), (3085, 6704), (3352, 6170), (4190, 4936)]