20851880

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{74471}}^1$

素因数の和:74489

約数の個数: 32

約数和(自身を含む): 53619840

約数和(自身を除く): 32767960

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 74471, 148942, 297884, 372355, 521297, 595768, 744710, 1042594, 1489420, 2085188, 2606485, 2978840, 4170376, 5212970, 10425940, 20851880]

約数ペア:

[(1, 20851880), (2, 10425940), (4, 5212970), (5, 4170376), (7, 2978840), (8, 2606485), (10, 2085188), (14, 1489420), (20, 1042594), (28, 744710), (35, 595768), (40, 521297), (56, 372355), (70, 297884), (140, 148942), (280, 74471)]