21897141

素因数分解:

$3^1\times 7^1\times {\mathrm{67}}^1\times {\mathrm{79}}^1\times {\mathrm{197}}^1$

素因数の和:353

約数の個数: 32

約数和(自身を含む): 34467840

約数和(自身を除く): 12570699

約数列:

[1, 3, 7, 21, 67, 79, 197, 201, 237, 469, 553, 591, 1379, 1407, 1659, 4137, 5293, 13199, 15563, 15879, 37051, 39597, 46689, 92393, 108941, 111153, 277179, 326823, 1042721, 3128163, 7299047, 21897141]

約数ペア:

[(1, 21897141), (3, 7299047), (7, 3128163), (21, 1042721), (67, 326823), (79, 277179), (197, 111153), (201, 108941), (237, 92393), (469, 46689), (553, 39597), (591, 37051), (1379, 15879), (1407, 15563), (1659, 13199), (4137, 5293)]