21293168

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{167}}^1\times {\mathrm{613}}^1$

素因数の和:801

約数の個数: 40

約数和(自身を含む): 44767968

約数和(自身を除く): 23474800

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 104, 167, 208, 334, 613, 668, 1226, 1336, 2171, 2452, 2672, 4342, 4904, 7969, 8684, 9808, 15938, 17368, 31876, 34736, 63752, 102371, 127504, 204742, 409484, 818968, 1330823, 1637936, 2661646, 5323292, 10646584, 21293168]

約数ペア:

[(1, 21293168), (2, 10646584), (4, 5323292), (8, 2661646), (13, 1637936), (16, 1330823), (26, 818968), (52, 409484), (104, 204742), (167, 127504), (208, 102371), (334, 63752), (613, 34736), (668, 31876), (1226, 17368), (1336, 15938), (2171, 9808), (2452, 8684), (2672, 7969), (4342, 4904)]