21085616

素因数分解:

$2^4\times {\mathrm{619}}^1\times {\mathrm{2129}}^1$

素因数の和:2756

約数の個数: 20

約数和(自身を含む): 40938600

約数和(自身を除く): 19852984

約数列:

[1, 2, 4, 8, 16, 619, 1238, 2129, 2476, 4258, 4952, 8516, 9904, 17032, 34064, 1317851, 2635702, 5271404, 10542808, 21085616]

約数ペア:

[(1, 21085616), (2, 10542808), (4, 5271404), (8, 2635702), (16, 1317851), (619, 34064), (1238, 17032), (2129, 9904), (2476, 8516), (4258, 4952)]