31887639

素因数分解:

$3^2\times 7^1\times {\mathrm{43}}^1\times {\mathrm{79}}^1\times {\mathrm{149}}^1$

素因数の和:284

約数の個数: 48

約数和(自身を含む): 54912000

約数和(自身を除く): 23024361

約数列:

[1, 3, 7, 9, 21, 43, 63, 79, 129, 149, 237, 301, 387, 447, 553, 711, 903, 1043, 1341, 1659, 2709, 3129, 3397, 4977, 6407, 9387, 10191, 11771, 19221, 23779, 30573, 35313, 44849, 57663, 71337, 82397, 105939, 134547, 214011, 247191, 403641, 506153, 741573, 1518459, 3543071, 4555377, 10629213, 31887639]

約数ペア:

[(1, 31887639), (3, 10629213), (7, 4555377), (9, 3543071), (21, 1518459), (43, 741573), (63, 506153), (79, 403641), (129, 247191), (149, 214011), (237, 134547), (301, 105939), (387, 82397), (447, 71337), (553, 57663), (711, 44849), (903, 35313), (1043, 30573), (1341, 23779), (1659, 19221), (2709, 11771), (3129, 10191), (3397, 9387), (4977, 6407)]