20887040

素因数分解:

$2^9\times 5^1\times {\mathrm{41}}^1\times {\mathrm{199}}^1$

素因数の和:263

約数の個数: 80

約数和(自身を含む): 51559200

約数和(自身を除く): 30672160

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 41, 64, 80, 82, 128, 160, 164, 199, 205, 256, 320, 328, 398, 410, 512, 640, 656, 796, 820, 995, 1280, 1312, 1592, 1640, 1990, 2560, 2624, 3184, 3280, 3980, 5248, 6368, 6560, 7960, 8159, 10496, 12736, 13120, 15920, 16318, 20992, 25472, 26240, 31840, 32636, 40795, 50944, 52480, 63680, 65272, 81590, 101888, 104960, 127360, 130544, 163180, 254720, 261088, 326360, 509440, 522176, 652720, 1044352, 1305440, 2088704, 2610880, 4177408, 5221760, 10443520, 20887040]

約数ペア:

[(1, 20887040), (2, 10443520), (4, 5221760), (5, 4177408), (8, 2610880), (10, 2088704), (16, 1305440), (20, 1044352), (32, 652720), (40, 522176), (41, 509440), (64, 326360), (80, 261088), (82, 254720), (128, 163180), (160, 130544), (164, 127360), (199, 104960), (205, 101888), (256, 81590), (320, 65272), (328, 63680), (398, 52480), (410, 50944), (512, 40795), (640, 32636), (656, 31840), (796, 26240), (820, 25472), (995, 20992), (1280, 16318), (1312, 15920), (1592, 13120), (1640, 12736), (1990, 10496), (2560, 8159), (2624, 7960), (3184, 6560), (3280, 6368), (3980, 5248)]