77921920

素因数分解:

$2^7\times 5^1\times {\mathrm{109}}^1\times {\mathrm{1117}}^1$

素因数の和:1245

約数の個数: 64

約数和(自身を含む): 188159400

約数和(自身を除く): 110237480

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 109, 128, 160, 218, 320, 436, 545, 640, 872, 1090, 1117, 1744, 2180, 2234, 3488, 4360, 4468, 5585, 6976, 8720, 8936, 11170, 13952, 17440, 17872, 22340, 34880, 35744, 44680, 69760, 71488, 89360, 121753, 142976, 178720, 243506, 357440, 487012, 608765, 714880, 974024, 1217530, 1948048, 2435060, 3896096, 4870120, 7792192, 9740240, 15584384, 19480480, 38960960, 77921920]

約数ペア:

[(1, 77921920), (2, 38960960), (4, 19480480), (5, 15584384), (8, 9740240), (10, 7792192), (16, 4870120), (20, 3896096), (32, 2435060), (40, 1948048), (64, 1217530), (80, 974024), (109, 714880), (128, 608765), (160, 487012), (218, 357440), (320, 243506), (436, 178720), (545, 142976), (640, 121753), (872, 89360), (1090, 71488), (1117, 69760), (1744, 44680), (2180, 35744), (2234, 34880), (3488, 22340), (4360, 17872), (4468, 17440), (5585, 13952), (6976, 11170), (8720, 8936)]