21406640

素因数分解:

$2^4\times 5^1\times {\mathrm{29}}^1\times {\mathrm{9227}}^1$

素因数の和:9269

約数の個数: 40

約数和(自身を含む): 51492240

約数和(自身を除く): 30085600

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 29, 40, 58, 80, 116, 145, 232, 290, 464, 580, 1160, 2320, 9227, 18454, 36908, 46135, 73816, 92270, 147632, 184540, 267583, 369080, 535166, 738160, 1070332, 1337915, 2140664, 2675830, 4281328, 5351660, 10703320, 21406640]

約数ペア:

[(1, 21406640), (2, 10703320), (4, 5351660), (5, 4281328), (8, 2675830), (10, 2140664), (16, 1337915), (20, 1070332), (29, 738160), (40, 535166), (58, 369080), (80, 267583), (116, 184540), (145, 147632), (232, 92270), (290, 73816), (464, 46135), (580, 36908), (1160, 18454), (2320, 9227)]