21323225

素因数分解:

$5^2\times 7^1\times {\mathrm{11}}^2\times {\mathrm{19}}^1\times {\mathrm{53}}^1$

素因数の和:111

約数の個数: 72

約数和(自身を含む): 35622720

約数和(自身を除く): 14299495

約数列:

[1, 5, 7, 11, 19, 25, 35, 53, 55, 77, 95, 121, 133, 175, 209, 265, 275, 371, 385, 475, 583, 605, 665, 847, 1007, 1045, 1325, 1463, 1855, 1925, 2299, 2915, 3025, 3325, 4081, 4235, 5035, 5225, 6413, 7049, 7315, 9275, 11077, 11495, 14575, 16093, 20405, 21175, 25175, 32065, 35245, 36575, 44891, 55385, 57475, 77539, 80465, 102025, 121847, 160325, 176225, 224455, 276925, 387695, 402325, 609235, 852929, 1122275, 1938475, 3046175, 4264645, 21323225]

約数ペア:

[(1, 21323225), (5, 4264645), (7, 3046175), (11, 1938475), (19, 1122275), (25, 852929), (35, 609235), (53, 402325), (55, 387695), (77, 276925), (95, 224455), (121, 176225), (133, 160325), (175, 121847), (209, 102025), (265, 80465), (275, 77539), (371, 57475), (385, 55385), (475, 44891), (583, 36575), (605, 35245), (665, 32065), (847, 25175), (1007, 21175), (1045, 20405), (1325, 16093), (1463, 14575), (1855, 11495), (1925, 11077), (2299, 9275), (2915, 7315), (3025, 7049), (3325, 6413), (4081, 5225), (4235, 5035)]