81429760

素因数分解:

$2^8\times 5^1\times {\mathrm{63617}}^1$

素因数の和:63638

約数の個数: 36

約数和(自身を含む): 195052788

約数和(自身を除く): 113623028

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 256, 320, 640, 1280, 63617, 127234, 254468, 318085, 508936, 636170, 1017872, 1272340, 2035744, 2544680, 4071488, 5089360, 8142976, 10178720, 16285952, 20357440, 40714880, 81429760]

約数ペア:

[(1, 81429760), (2, 40714880), (4, 20357440), (5, 16285952), (8, 10178720), (10, 8142976), (16, 5089360), (20, 4071488), (32, 2544680), (40, 2035744), (64, 1272340), (80, 1017872), (128, 636170), (160, 508936), (256, 318085), (320, 254468), (640, 127234), (1280, 63617)]