81441760

素因数分解:

$2^5\times 5^1\times {\mathrm{431}}^1\times {\mathrm{1181}}^1$

素因数の和:1627

約数の個数: 48

約数和(自身を含む): 193015872

約数和(自身を除く): 111574112

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 431, 862, 1181, 1724, 2155, 2362, 3448, 4310, 4724, 5905, 6896, 8620, 9448, 11810, 13792, 17240, 18896, 23620, 34480, 37792, 47240, 68960, 94480, 188960, 509011, 1018022, 2036044, 2545055, 4072088, 5090110, 8144176, 10180220, 16288352, 20360440, 40720880, 81441760]

約数ペア:

[(1, 81441760), (2, 40720880), (4, 20360440), (5, 16288352), (8, 10180220), (10, 8144176), (16, 5090110), (20, 4072088), (32, 2545055), (40, 2036044), (80, 1018022), (160, 509011), (431, 188960), (862, 94480), (1181, 68960), (1724, 47240), (2155, 37792), (2362, 34480), (3448, 23620), (4310, 18896), (4724, 17240), (5905, 13792), (6896, 11810), (8620, 9448)]