39998140

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{21977}}^1$

素因数の和:22006

約数の個数: 48

約数和(自身を含む): 103384512

約数和(自身を除く): 63386372

約数列:

[1, 2, 4, 5, 7, 10, 13, 14, 20, 26, 28, 35, 52, 65, 70, 91, 130, 140, 182, 260, 364, 455, 910, 1820, 21977, 43954, 87908, 109885, 153839, 219770, 285701, 307678, 439540, 571402, 615356, 769195, 1142804, 1428505, 1538390, 1999907, 2857010, 3076780, 3999814, 5714020, 7999628, 9999535, 19999070, 39998140]

約数ペア:

[(1, 39998140), (2, 19999070), (4, 9999535), (5, 7999628), (7, 5714020), (10, 3999814), (13, 3076780), (14, 2857010), (20, 1999907), (26, 1538390), (28, 1428505), (35, 1142804), (52, 769195), (65, 615356), (70, 571402), (91, 439540), (130, 307678), (140, 285701), (182, 219770), (260, 153839), (364, 109885), (455, 87908), (910, 43954), (1820, 21977)]