18787545

素因数分解:

$3^5\times 5^1\times 7^1\times {\mathrm{47}}^2$

素因数の和:121

約数の個数: 72

約数和(自身を含む): 39434304

約数和(自身を除く): 20646759

約数列:

[1, 3, 5, 7, 9, 15, 21, 27, 35, 45, 47, 63, 81, 105, 135, 141, 189, 235, 243, 315, 329, 405, 423, 567, 705, 945, 987, 1215, 1269, 1645, 1701, 2115, 2209, 2835, 2961, 3807, 4935, 6345, 6627, 8505, 8883, 11045, 11421, 14805, 15463, 19035, 19881, 26649, 33135, 44415, 46389, 57105, 59643, 77315, 79947, 99405, 133245, 139167, 178929, 231945, 298215, 399735, 417501, 536787, 695835, 894645, 1252503, 2087505, 2683935, 3757509, 6262515, 18787545]

約数ペア:

[(1, 18787545), (3, 6262515), (5, 3757509), (7, 2683935), (9, 2087505), (15, 1252503), (21, 894645), (27, 695835), (35, 536787), (45, 417501), (47, 399735), (63, 298215), (81, 231945), (105, 178929), (135, 139167), (141, 133245), (189, 99405), (235, 79947), (243, 77315), (315, 59643), (329, 57105), (405, 46389), (423, 44415), (567, 33135), (705, 26649), (945, 19881), (987, 19035), (1215, 15463), (1269, 14805), (1645, 11421), (1701, 11045), (2115, 8883), (2209, 8505), (2835, 6627), (2961, 6345), (3807, 4935)]