21591885

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{79}}^1\times {\mathrm{137}}^1$

素因数の和:250

約数の個数: 64

約数和(自身を含む): 42393600

約数和(自身を除く): 20801715

約数列:

[1, 3, 5, 7, 15, 19, 21, 35, 57, 79, 95, 105, 133, 137, 237, 285, 395, 399, 411, 553, 665, 685, 959, 1185, 1501, 1659, 1995, 2055, 2603, 2765, 2877, 4503, 4795, 7505, 7809, 8295, 10507, 10823, 13015, 14385, 18221, 22515, 31521, 32469, 39045, 52535, 54115, 54663, 75761, 91105, 157605, 162345, 205637, 227283, 273315, 378805, 616911, 1028185, 1136415, 1439459, 3084555, 4318377, 7197295, 21591885]

約数ペア:

[(1, 21591885), (3, 7197295), (5, 4318377), (7, 3084555), (15, 1439459), (19, 1136415), (21, 1028185), (35, 616911), (57, 378805), (79, 273315), (95, 227283), (105, 205637), (133, 162345), (137, 157605), (237, 91105), (285, 75761), (395, 54663), (399, 54115), (411, 52535), (553, 39045), (665, 32469), (685, 31521), (959, 22515), (1185, 18221), (1501, 14385), (1659, 13015), (1995, 10823), (2055, 10507), (2603, 8295), (2765, 7809), (2877, 7505), (4503, 4795)]