21388227

素因数分解:

$3^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{181}}^1\times {\mathrm{331}}^1$

素因数の和:539

約数の個数: 32

約数和(自身を含む): 34804224

約数和(自身を除く): 13415997

約数列:

[1, 3, 7, 17, 21, 51, 119, 181, 331, 357, 543, 993, 1267, 2317, 3077, 3801, 5627, 6951, 9231, 16881, 21539, 39389, 59911, 64617, 118167, 179733, 419377, 1018487, 1258131, 3055461, 7129409, 21388227]

約数ペア:

[(1, 21388227), (3, 7129409), (7, 3055461), (17, 1258131), (21, 1018487), (51, 419377), (119, 179733), (181, 118167), (331, 64617), (357, 59911), (543, 39389), (993, 21539), (1267, 16881), (2317, 9231), (3077, 6951), (3801, 5627)]