21254090

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{89}}^1\times {\mathrm{167}}^1$

素因数の和:287

約数の個数: 64

約数和(自身を含む): 45722880

約数和(自身を除く): 24468790

約数列:

[1, 2, 5, 10, 11, 13, 22, 26, 55, 65, 89, 110, 130, 143, 167, 178, 286, 334, 445, 715, 835, 890, 979, 1157, 1430, 1670, 1837, 1958, 2171, 2314, 3674, 4342, 4895, 5785, 9185, 9790, 10855, 11570, 12727, 14863, 18370, 21710, 23881, 25454, 29726, 47762, 63635, 74315, 119405, 127270, 148630, 163493, 193219, 238810, 326986, 386438, 817465, 966095, 1634930, 1932190, 2125409, 4250818, 10627045, 21254090]

約数ペア:

[(1, 21254090), (2, 10627045), (5, 4250818), (10, 2125409), (11, 1932190), (13, 1634930), (22, 966095), (26, 817465), (55, 386438), (65, 326986), (89, 238810), (110, 193219), (130, 163493), (143, 148630), (167, 127270), (178, 119405), (286, 74315), (334, 63635), (445, 47762), (715, 29726), (835, 25454), (890, 23881), (979, 21710), (1157, 18370), (1430, 14863), (1670, 12727), (1837, 11570), (1958, 10855), (2171, 9790), (2314, 9185), (3674, 5785), (4342, 4895)]