16720980

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{43}}^1\times {\mathrm{6481}}^1$

素因数の和:6536

約数の個数: 48

約数和(自身を含む): 47914944

約数和(自身を除く): 31193964

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 43, 60, 86, 129, 172, 215, 258, 430, 516, 645, 860, 1290, 2580, 6481, 12962, 19443, 25924, 32405, 38886, 64810, 77772, 97215, 129620, 194430, 278683, 388860, 557366, 836049, 1114732, 1393415, 1672098, 2786830, 3344196, 4180245, 5573660, 8360490, 16720980]

約数ペア:

[(1, 16720980), (2, 8360490), (3, 5573660), (4, 4180245), (5, 3344196), (6, 2786830), (10, 1672098), (12, 1393415), (15, 1114732), (20, 836049), (30, 557366), (43, 388860), (60, 278683), (86, 194430), (129, 129620), (172, 97215), (215, 77772), (258, 64810), (430, 38886), (516, 32405), (645, 25924), (860, 19443), (1290, 12962), (2580, 6481)]