21123760

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{67}}^1\times {\mathrm{563}}^1$

素因数の和:650

約数の個数: 80

約数和(自身を含む): 57067776

約数和(自身を除く): 35944016

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 56, 67, 70, 80, 112, 134, 140, 268, 280, 335, 469, 536, 560, 563, 670, 938, 1072, 1126, 1340, 1876, 2252, 2345, 2680, 2815, 3752, 3941, 4504, 4690, 5360, 5630, 7504, 7882, 9008, 9380, 11260, 15764, 18760, 19705, 22520, 31528, 37520, 37721, 39410, 45040, 63056, 75442, 78820, 150884, 157640, 188605, 264047, 301768, 315280, 377210, 528094, 603536, 754420, 1056188, 1320235, 1508840, 2112376, 2640470, 3017680, 4224752, 5280940, 10561880, 21123760]

約数ペア:

[(1, 21123760), (2, 10561880), (4, 5280940), (5, 4224752), (7, 3017680), (8, 2640470), (10, 2112376), (14, 1508840), (16, 1320235), (20, 1056188), (28, 754420), (35, 603536), (40, 528094), (56, 377210), (67, 315280), (70, 301768), (80, 264047), (112, 188605), (134, 157640), (140, 150884), (268, 78820), (280, 75442), (335, 63056), (469, 45040), (536, 39410), (560, 37721), (563, 37520), (670, 31528), (938, 22520), (1072, 19705), (1126, 18760), (1340, 15764), (1876, 11260), (2252, 9380), (2345, 9008), (2680, 7882), (2815, 7504), (3752, 5630), (3941, 5360), (4504, 4690)]