19492780

素因数分解:

$2^2\times 5^1\times {\mathrm{47}}^1\times {\mathrm{89}}^1\times {\mathrm{233}}^1$

素因数の和:378

約数の個数: 48

約数和(自身を含む): 42456960

約数和(自身を除く): 22964180

約数列:

[1, 2, 4, 5, 10, 20, 47, 89, 94, 178, 188, 233, 235, 356, 445, 466, 470, 890, 932, 940, 1165, 1780, 2330, 4183, 4660, 8366, 10951, 16732, 20737, 20915, 21902, 41474, 41830, 43804, 54755, 82948, 83660, 103685, 109510, 207370, 219020, 414740, 974639, 1949278, 3898556, 4873195, 9746390, 19492780]

約数ペア:

[(1, 19492780), (2, 9746390), (4, 4873195), (5, 3898556), (10, 1949278), (20, 974639), (47, 414740), (89, 219020), (94, 207370), (178, 109510), (188, 103685), (233, 83660), (235, 82948), (356, 54755), (445, 43804), (466, 41830), (470, 41474), (890, 21902), (932, 20915), (940, 20737), (1165, 16732), (1780, 10951), (2330, 8366), (4183, 4660)]