21192800

素因数分解:

$2^5\times 5^2\times {\mathrm{59}}^1\times {\mathrm{449}}^1$

素因数の和:528

約数の個数: 72

約数和(自身を含む): 52731000

約数和(自身を除く): 31538200

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 59, 80, 100, 118, 160, 200, 236, 295, 400, 449, 472, 590, 800, 898, 944, 1180, 1475, 1796, 1888, 2245, 2360, 2950, 3592, 4490, 4720, 5900, 7184, 8980, 9440, 11225, 11800, 14368, 17960, 22450, 23600, 26491, 35920, 44900, 47200, 52982, 71840, 89800, 105964, 132455, 179600, 211928, 264910, 359200, 423856, 529820, 662275, 847712, 1059640, 1324550, 2119280, 2649100, 4238560, 5298200, 10596400, 21192800]

約数ペア:

[(1, 21192800), (2, 10596400), (4, 5298200), (5, 4238560), (8, 2649100), (10, 2119280), (16, 1324550), (20, 1059640), (25, 847712), (32, 662275), (40, 529820), (50, 423856), (59, 359200), (80, 264910), (100, 211928), (118, 179600), (160, 132455), (200, 105964), (236, 89800), (295, 71840), (400, 52982), (449, 47200), (472, 44900), (590, 35920), (800, 26491), (898, 23600), (944, 22450), (1180, 17960), (1475, 14368), (1796, 11800), (1888, 11225), (2245, 9440), (2360, 8980), (2950, 7184), (3592, 5900), (4490, 4720)]