21216153

素因数分解:

$3^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{67}}^1\times {\mathrm{887}}^1$

素因数の和:981

約数の個数: 32

約数和(自身を含む): 34781184

約数和(自身を除く): 13565031

約数列:

[1, 3, 7, 17, 21, 51, 67, 119, 201, 357, 469, 887, 1139, 1407, 2661, 3417, 6209, 7973, 15079, 18627, 23919, 45237, 59429, 105553, 178287, 316659, 416003, 1010293, 1248009, 3030879, 7072051, 21216153]

約数ペア:

[(1, 21216153), (3, 7072051), (7, 3030879), (17, 1248009), (21, 1010293), (51, 416003), (67, 316659), (119, 178287), (201, 105553), (357, 59429), (469, 45237), (887, 23919), (1139, 18627), (1407, 15079), (2661, 7973), (3417, 6209)]