21338710

素因数分解:

$2^1\times 5^1\times {\mathrm{19}}^2\times {\mathrm{23}}^1\times {\mathrm{257}}^1$

素因数の和:325

約数の個数: 48

約数和(自身を含む): 42464736

約数和(自身を除く): 21126026

約数列:

[1, 2, 5, 10, 19, 23, 38, 46, 95, 115, 190, 230, 257, 361, 437, 514, 722, 874, 1285, 1805, 2185, 2570, 3610, 4370, 4883, 5911, 8303, 9766, 11822, 16606, 24415, 29555, 41515, 48830, 59110, 83030, 92777, 112309, 185554, 224618, 463885, 561545, 927770, 1123090, 2133871, 4267742, 10669355, 21338710]

約数ペア:

[(1, 21338710), (2, 10669355), (5, 4267742), (10, 2133871), (19, 1123090), (23, 927770), (38, 561545), (46, 463885), (95, 224618), (115, 185554), (190, 112309), (230, 92777), (257, 83030), (361, 59110), (437, 48830), (514, 41515), (722, 29555), (874, 24415), (1285, 16606), (1805, 11822), (2185, 9766), (2570, 8303), (3610, 5911), (4370, 4883)]