21520872

素因数分解:

$2^3\times 3^2\times {\mathrm{499}}^1\times {\mathrm{599}}^1$

素因数の和:1110

約数の個数: 48

約数和(自身を含む): 58500000

約数和(自身を除く): 36979128

約数列:

[1, 2, 3, 4, 6, 8, 9, 12, 18, 24, 36, 72, 499, 599, 998, 1198, 1497, 1797, 1996, 2396, 2994, 3594, 3992, 4491, 4792, 5391, 5988, 7188, 8982, 10782, 11976, 14376, 17964, 21564, 35928, 43128, 298901, 597802, 896703, 1195604, 1793406, 2391208, 2690109, 3586812, 5380218, 7173624, 10760436, 21520872]

約数ペア:

[(1, 21520872), (2, 10760436), (3, 7173624), (4, 5380218), (6, 3586812), (8, 2690109), (9, 2391208), (12, 1793406), (18, 1195604), (24, 896703), (36, 597802), (72, 298901), (499, 43128), (599, 35928), (998, 21564), (1198, 17964), (1497, 14376), (1797, 11976), (1996, 10782), (2396, 8982), (2994, 7188), (3594, 5988), (3992, 5391), (4491, 4792)]