21685965

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{12149}}^1$

素因数の和:12181

約数の個数: 32

約数和(自身を含む): 41990400

約数和(自身を除く): 20304435

約数列:

[1, 3, 5, 7, 15, 17, 21, 35, 51, 85, 105, 119, 255, 357, 595, 1785, 12149, 36447, 60745, 85043, 182235, 206533, 255129, 425215, 619599, 1032665, 1275645, 1445731, 3097995, 4337193, 7228655, 21685965]

約数ペア:

[(1, 21685965), (3, 7228655), (5, 4337193), (7, 3097995), (15, 1445731), (17, 1275645), (21, 1032665), (35, 619599), (51, 425215), (85, 255129), (105, 206533), (119, 182235), (255, 85043), (357, 60745), (595, 36447), (1785, 12149)]