21907325

素因数分解:

$5^2\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{41}}^1\times {\mathrm{67}}^1$

素因数の和:158

約数の個数: 48

約数和(自身を含む): 31872960

約数和(自身を除く): 9965635

約数列:

[1, 5, 11, 25, 29, 41, 55, 67, 145, 205, 275, 319, 335, 451, 725, 737, 1025, 1189, 1595, 1675, 1943, 2255, 2747, 3685, 5945, 7975, 9715, 11275, 13079, 13735, 18425, 21373, 29725, 30217, 48575, 65395, 68675, 79663, 106865, 151085, 326975, 398315, 534325, 755425, 876293, 1991575, 4381465, 21907325]

約数ペア:

[(1, 21907325), (5, 4381465), (11, 1991575), (25, 876293), (29, 755425), (41, 534325), (55, 398315), (67, 326975), (145, 151085), (205, 106865), (275, 79663), (319, 68675), (335, 65395), (451, 48575), (725, 30217), (737, 29725), (1025, 21373), (1189, 18425), (1595, 13735), (1675, 13079), (1943, 11275), (2255, 9715), (2747, 7975), (3685, 5945)]