20789510

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{47}}^1\times {\mathrm{71}}^1\times {\mathrm{89}}^1$

素因数の和:221

約数の個数: 64

約数和(自身を含む): 44789760

約数和(自身を除く): 24000250

約数列:

[1, 2, 5, 7, 10, 14, 35, 47, 70, 71, 89, 94, 142, 178, 235, 329, 355, 445, 470, 497, 623, 658, 710, 890, 994, 1246, 1645, 2485, 3115, 3290, 3337, 4183, 4970, 6230, 6319, 6674, 8366, 12638, 16685, 20915, 23359, 29281, 31595, 33370, 41830, 44233, 46718, 58562, 63190, 88466, 116795, 146405, 221165, 233590, 292810, 296993, 442330, 593986, 1484965, 2078951, 2969930, 4157902, 10394755, 20789510]

約数ペア:

[(1, 20789510), (2, 10394755), (5, 4157902), (7, 2969930), (10, 2078951), (14, 1484965), (35, 593986), (47, 442330), (70, 296993), (71, 292810), (89, 233590), (94, 221165), (142, 146405), (178, 116795), (235, 88466), (329, 63190), (355, 58562), (445, 46718), (470, 44233), (497, 41830), (623, 33370), (658, 31595), (710, 29281), (890, 23359), (994, 20915), (1246, 16685), (1645, 12638), (2485, 8366), (3115, 6674), (3290, 6319), (3337, 6230), (4183, 4970)]