21379040

素因数分解:

$2^5\times 5^1\times {\mathrm{41}}^1\times {\mathrm{3259}}^1$

素因数の和:3315

約数の個数: 48

約数和(自身を含む): 51755760

約数和(自身を除く): 30376720

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 41, 80, 82, 160, 164, 205, 328, 410, 656, 820, 1312, 1640, 3259, 3280, 6518, 6560, 13036, 16295, 26072, 32590, 52144, 65180, 104288, 130360, 133619, 260720, 267238, 521440, 534476, 668095, 1068952, 1336190, 2137904, 2672380, 4275808, 5344760, 10689520, 21379040]

約数ペア:

[(1, 21379040), (2, 10689520), (4, 5344760), (5, 4275808), (8, 2672380), (10, 2137904), (16, 1336190), (20, 1068952), (32, 668095), (40, 534476), (41, 521440), (80, 267238), (82, 260720), (160, 133619), (164, 130360), (205, 104288), (328, 65180), (410, 52144), (656, 32590), (820, 26072), (1312, 16295), (1640, 13036), (3259, 6560), (3280, 6518)]