20404845

素因数分解:

$3^3\times 5^1\times {\mathrm{17}}^2\times {\mathrm{523}}^1$

素因数の和:571

約数の個数: 48

約数和(自身を含む): 38608320

約数和(自身を除く): 18203475

約数列:

[1, 3, 5, 9, 15, 17, 27, 45, 51, 85, 135, 153, 255, 289, 459, 523, 765, 867, 1445, 1569, 2295, 2601, 2615, 4335, 4707, 7803, 7845, 8891, 13005, 14121, 23535, 26673, 39015, 44455, 70605, 80019, 133365, 151147, 240057, 400095, 453441, 755735, 1200285, 1360323, 2267205, 4080969, 6801615, 20404845]

約数ペア:

[(1, 20404845), (3, 6801615), (5, 4080969), (9, 2267205), (15, 1360323), (17, 1200285), (27, 755735), (45, 453441), (51, 400095), (85, 240057), (135, 151147), (153, 133365), (255, 80019), (289, 70605), (459, 44455), (523, 39015), (765, 26673), (867, 23535), (1445, 14121), (1569, 13005), (2295, 8891), (2601, 7845), (2615, 7803), (4335, 4707)]