20809845

素因数分解:

$3^3\times 5^1\times 7^1\times {\mathrm{19}}^2\times {\mathrm{61}}^1$

素因数の和:120

約数の個数: 96

約数和(自身を含む): 45354240

約数和(自身を除く): 24544395

約数列:

[1, 3, 5, 7, 9, 15, 19, 21, 27, 35, 45, 57, 61, 63, 95, 105, 133, 135, 171, 183, 189, 285, 305, 315, 361, 399, 427, 513, 549, 665, 855, 915, 945, 1083, 1159, 1197, 1281, 1647, 1805, 1995, 2135, 2527, 2565, 2745, 3249, 3477, 3591, 3843, 5415, 5795, 5985, 6405, 7581, 8113, 8235, 9747, 10431, 11529, 12635, 16245, 17385, 17955, 19215, 22021, 22743, 24339, 31293, 37905, 40565, 48735, 52155, 57645, 66063, 68229, 73017, 110105, 113715, 121695, 154147, 156465, 198189, 219051, 330315, 341145, 365085, 462441, 594567, 770735, 990945, 1095255, 1387323, 2312205, 2972835, 4161969, 6936615, 20809845]

約数ペア:

[(1, 20809845), (3, 6936615), (5, 4161969), (7, 2972835), (9, 2312205), (15, 1387323), (19, 1095255), (21, 990945), (27, 770735), (35, 594567), (45, 462441), (57, 365085), (61, 341145), (63, 330315), (95, 219051), (105, 198189), (133, 156465), (135, 154147), (171, 121695), (183, 113715), (189, 110105), (285, 73017), (305, 68229), (315, 66063), (361, 57645), (399, 52155), (427, 48735), (513, 40565), (549, 37905), (665, 31293), (855, 24339), (915, 22743), (945, 22021), (1083, 19215), (1159, 17955), (1197, 17385), (1281, 16245), (1647, 12635), (1805, 11529), (1995, 10431), (2135, 9747), (2527, 8235), (2565, 8113), (2745, 7581), (3249, 6405), (3477, 5985), (3591, 5795), (3843, 5415)]