21399610

素因数分解:

$2^1\times 5^1\times {\mathrm{31}}^1\times {\mathrm{69031}}^1$

素因数の和:69069

約数の個数: 16

約数和(自身を含む): 39762432

約数和(自身を除く): 18362822

約数列:

[1, 2, 5, 10, 31, 62, 155, 310, 69031, 138062, 345155, 690310, 2139961, 4279922, 10699805, 21399610]

約数ペア:

[(1, 21399610), (2, 10699805), (5, 4279922), (10, 2139961), (31, 690310), (62, 345155), (155, 138062), (310, 69031)]