21299516

素因数分解:

$2^2\times 7^2\times {\mathrm{271}}^1\times {\mathrm{401}}^1$

素因数の和:690

約数の個数: 36

約数和(自身を含む): 43628256

約数和(自身を除く): 22328740

約数列:

[1, 2, 4, 7, 14, 28, 49, 98, 196, 271, 401, 542, 802, 1084, 1604, 1897, 2807, 3794, 5614, 7588, 11228, 13279, 19649, 26558, 39298, 53116, 78596, 108671, 217342, 434684, 760697, 1521394, 3042788, 5324879, 10649758, 21299516]

約数ペア:

[(1, 21299516), (2, 10649758), (4, 5324879), (7, 3042788), (14, 1521394), (28, 760697), (49, 434684), (98, 217342), (196, 108671), (271, 78596), (401, 53116), (542, 39298), (802, 26558), (1084, 19649), (1604, 13279), (1897, 11228), (2807, 7588), (3794, 5614)]