278726049

素因数分解:

$3^3\times 7^1\times {\mathrm{71}}^1\times {\mathrm{20771}}^1$

素因数の和:20858

約数の個数: 32

約数和(自身を含む): 478586880

約数和(自身を除く): 199860831

約数列:

[1, 3, 7, 9, 21, 27, 63, 71, 189, 213, 497, 639, 1491, 1917, 4473, 13419, 20771, 62313, 145397, 186939, 436191, 560817, 1308573, 1474741, 3925719, 4424223, 10323187, 13272669, 30969561, 39818007, 92908683, 278726049]

約数ペア:

[(1, 278726049), (3, 92908683), (7, 39818007), (9, 30969561), (21, 13272669), (27, 10323187), (63, 4424223), (71, 3925719), (189, 1474741), (213, 1308573), (497, 560817), (639, 436191), (1491, 186939), (1917, 145397), (4473, 62313), (13419, 20771)]