19840120

素因数分解:

$2^3\times 5^1\times {\mathrm{563}}^1\times {\mathrm{881}}^1$

素因数の和:1455

約数の個数: 32

約数和(自身を含む): 44770320

約数和(自身を除く): 24930200

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 563, 881, 1126, 1762, 2252, 2815, 3524, 4405, 4504, 5630, 7048, 8810, 11260, 17620, 22520, 35240, 496003, 992006, 1984012, 2480015, 3968024, 4960030, 9920060, 19840120]

約数ペア:

[(1, 19840120), (2, 9920060), (4, 4960030), (5, 3968024), (8, 2480015), (10, 1984012), (20, 992006), (40, 496003), (563, 35240), (881, 22520), (1126, 17620), (1762, 11260), (2252, 8810), (2815, 7048), (3524, 5630), (4405, 4504)]