21839680

素因数分解:

$2^6\times 5^1\times {\mathrm{139}}^1\times {\mathrm{491}}^1$

素因数の和:647

約数の個数: 56

約数和(自身を含む): 52486560

約数和(自身を除く): 30646880

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 139, 160, 278, 320, 491, 556, 695, 982, 1112, 1390, 1964, 2224, 2455, 2780, 3928, 4448, 4910, 5560, 7856, 8896, 9820, 11120, 15712, 19640, 22240, 31424, 39280, 44480, 68249, 78560, 136498, 157120, 272996, 341245, 545992, 682490, 1091984, 1364980, 2183968, 2729960, 4367936, 5459920, 10919840, 21839680]

約数ペア:

[(1, 21839680), (2, 10919840), (4, 5459920), (5, 4367936), (8, 2729960), (10, 2183968), (16, 1364980), (20, 1091984), (32, 682490), (40, 545992), (64, 341245), (80, 272996), (139, 157120), (160, 136498), (278, 78560), (320, 68249), (491, 44480), (556, 39280), (695, 31424), (982, 22240), (1112, 19640), (1390, 15712), (1964, 11120), (2224, 9820), (2455, 8896), (2780, 7856), (3928, 5560), (4448, 4910)]