21438105

素因数分解:

$3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{29}}^1\times {\mathrm{223}}^1$

素因数の和:290

約数の個数: 64

約数和(自身を含む): 40642560

約数和(自身を除く): 19204455

約数列:

[1, 3, 5, 13, 15, 17, 29, 39, 51, 65, 85, 87, 145, 195, 221, 223, 255, 377, 435, 493, 663, 669, 1105, 1115, 1131, 1479, 1885, 2465, 2899, 3315, 3345, 3791, 5655, 6409, 6467, 7395, 8697, 11373, 14495, 18955, 19227, 19401, 32045, 32335, 43485, 49283, 56865, 84071, 96135, 97005, 109939, 147849, 246415, 252213, 329817, 420355, 549695, 739245, 1261065, 1429207, 1649085, 4287621, 7146035, 21438105]

約数ペア:

[(1, 21438105), (3, 7146035), (5, 4287621), (13, 1649085), (15, 1429207), (17, 1261065), (29, 739245), (39, 549695), (51, 420355), (65, 329817), (85, 252213), (87, 246415), (145, 147849), (195, 109939), (221, 97005), (223, 96135), (255, 84071), (377, 56865), (435, 49283), (493, 43485), (663, 32335), (669, 32045), (1105, 19401), (1115, 19227), (1131, 18955), (1479, 14495), (1885, 11373), (2465, 8697), (2899, 7395), (3315, 6467), (3345, 6409), (3791, 5655)]