21397203

素因数分解:

$3^4\times {\mathrm{17}}^1\times {\mathrm{41}}^1\times {\mathrm{379}}^1$

素因数の和:449

約数の個数: 40

約数和(自身を含む): 34760880

約数和(自身を除く): 13363677

約数列:

[1, 3, 9, 17, 27, 41, 51, 81, 123, 153, 369, 379, 459, 697, 1107, 1137, 1377, 2091, 3321, 3411, 6273, 6443, 10233, 15539, 18819, 19329, 30699, 46617, 56457, 57987, 139851, 173961, 264163, 419553, 521883, 792489, 1258659, 2377467, 7132401, 21397203]

約数ペア:

[(1, 21397203), (3, 7132401), (9, 2377467), (17, 1258659), (27, 792489), (41, 521883), (51, 419553), (81, 264163), (123, 173961), (153, 139851), (369, 57987), (379, 56457), (459, 46617), (697, 30699), (1107, 19329), (1137, 18819), (1377, 15539), (2091, 10233), (3321, 6443), (3411, 6273)]