19998460

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{131}}^1\times {\mathrm{449}}^1$

素因数の和:606

約数の個数: 48

約数和(自身を含む): 44906400

約数和(自身を除く): 24907940

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 68, 85, 131, 170, 262, 340, 449, 524, 655, 898, 1310, 1796, 2227, 2245, 2620, 4454, 4490, 7633, 8908, 8980, 11135, 15266, 22270, 30532, 38165, 44540, 58819, 76330, 117638, 152660, 235276, 294095, 588190, 999923, 1176380, 1999846, 3999692, 4999615, 9999230, 19998460]

約数ペア:

[(1, 19998460), (2, 9999230), (4, 4999615), (5, 3999692), (10, 1999846), (17, 1176380), (20, 999923), (34, 588190), (68, 294095), (85, 235276), (131, 152660), (170, 117638), (262, 76330), (340, 58819), (449, 44540), (524, 38165), (655, 30532), (898, 22270), (1310, 15266), (1796, 11135), (2227, 8980), (2245, 8908), (2620, 7633), (4454, 4490)]