21250229

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^2\times {\mathrm{23}}^1\times {\mathrm{71}}^1$

素因数の和:138

約数の個数: 48

約数和(自身を含む): 30357504

約数和(自身を除く): 9107275

約数列:

[1, 7, 11, 13, 23, 71, 77, 91, 143, 161, 169, 253, 299, 497, 781, 923, 1001, 1183, 1633, 1771, 1859, 2093, 3289, 3887, 5467, 6461, 10153, 11431, 11999, 13013, 17963, 21229, 23023, 27209, 42757, 71071, 83993, 125741, 131989, 148603, 233519, 275977, 299299, 923923, 1634633, 1931839, 3035747, 21250229]

約数ペア:

[(1, 21250229), (7, 3035747), (11, 1931839), (13, 1634633), (23, 923923), (71, 299299), (77, 275977), (91, 233519), (143, 148603), (161, 131989), (169, 125741), (253, 83993), (299, 71071), (497, 42757), (781, 27209), (923, 23023), (1001, 21229), (1183, 17963), (1633, 13013), (1771, 11999), (1859, 11431), (2093, 10153), (3289, 6461), (3887, 5467)]