21185451

素因数分解:

$3^2\times 7^1\times {\mathrm{17}}^1\times {\mathrm{131}}^1\times {\mathrm{151}}^1$

素因数の和:312

約数の個数: 48

約数和(自身を含む): 37559808

約数和(自身を除く): 16374357

約数列:

[1, 3, 7, 9, 17, 21, 51, 63, 119, 131, 151, 153, 357, 393, 453, 917, 1057, 1071, 1179, 1359, 2227, 2567, 2751, 3171, 6681, 7701, 8253, 9513, 15589, 17969, 19781, 20043, 23103, 46767, 53907, 59343, 138467, 140301, 161721, 178029, 336277, 415401, 1008831, 1246203, 2353939, 3026493, 7061817, 21185451]

約数ペア:

[(1, 21185451), (3, 7061817), (7, 3026493), (9, 2353939), (17, 1246203), (21, 1008831), (51, 415401), (63, 336277), (119, 178029), (131, 161721), (151, 140301), (153, 138467), (357, 59343), (393, 53907), (453, 46767), (917, 23103), (1057, 20043), (1071, 19781), (1179, 17969), (1359, 15589), (2227, 9513), (2567, 8253), (2751, 7701), (3171, 6681)]