20929280

素因数分解:

$2^8\times 5^1\times {\mathrm{83}}^1\times {\mathrm{197}}^1$

素因数の和:301

約数の個数: 72

約数和(自身を含む): 50993712

約数和(自身を除く): 30064432

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 83, 128, 160, 166, 197, 256, 320, 332, 394, 415, 640, 664, 788, 830, 985, 1280, 1328, 1576, 1660, 1970, 2656, 3152, 3320, 3940, 5312, 6304, 6640, 7880, 10624, 12608, 13280, 15760, 16351, 21248, 25216, 26560, 31520, 32702, 50432, 53120, 63040, 65404, 81755, 106240, 126080, 130808, 163510, 252160, 261616, 327020, 523232, 654040, 1046464, 1308080, 2092928, 2616160, 4185856, 5232320, 10464640, 20929280]

約数ペア:

[(1, 20929280), (2, 10464640), (4, 5232320), (5, 4185856), (8, 2616160), (10, 2092928), (16, 1308080), (20, 1046464), (32, 654040), (40, 523232), (64, 327020), (80, 261616), (83, 252160), (128, 163510), (160, 130808), (166, 126080), (197, 106240), (256, 81755), (320, 65404), (332, 63040), (394, 53120), (415, 50432), (640, 32702), (664, 31520), (788, 26560), (830, 25216), (985, 21248), (1280, 16351), (1328, 15760), (1576, 13280), (1660, 12608), (1970, 10624), (2656, 7880), (3152, 6640), (3320, 6304), (3940, 5312)]