21754221

素因数分解:

$3^1\times {\mathrm{19}}^2\times {\mathrm{53}}^1\times {\mathrm{379}}^1$

素因数の和:473

約数の個数: 24

約数和(自身を含む): 31272480

約数和(自身を除く): 9518259

約数列:

[1, 3, 19, 53, 57, 159, 361, 379, 1007, 1083, 1137, 3021, 7201, 19133, 20087, 21603, 57399, 60261, 136819, 381653, 410457, 1144959, 7251407, 21754221]

約数ペア:

[(1, 21754221), (3, 7251407), (19, 1144959), (53, 410457), (57, 381653), (159, 136819), (361, 60261), (379, 57399), (1007, 21603), (1083, 20087), (1137, 19133), (3021, 7201)]