21223755

素因数分解:

$3^3\times 5^1\times 7^1\times {\mathrm{37}}^1\times {\mathrm{607}}^1$

素因数の和:665

約数の個数: 64

約数和(自身を含む): 44359680

約数和(自身を除く): 23135925

約数列:

[1, 3, 5, 7, 9, 15, 21, 27, 35, 37, 45, 63, 105, 111, 135, 185, 189, 259, 315, 333, 555, 607, 777, 945, 999, 1295, 1665, 1821, 2331, 3035, 3885, 4249, 4995, 5463, 6993, 9105, 11655, 12747, 16389, 21245, 22459, 27315, 34965, 38241, 63735, 67377, 81945, 112295, 114723, 157213, 191205, 202131, 336885, 471639, 573615, 606393, 786065, 1010655, 1414917, 2358195, 3031965, 4244751, 7074585, 21223755]

約数ペア:

[(1, 21223755), (3, 7074585), (5, 4244751), (7, 3031965), (9, 2358195), (15, 1414917), (21, 1010655), (27, 786065), (35, 606393), (37, 573615), (45, 471639), (63, 336885), (105, 202131), (111, 191205), (135, 157213), (185, 114723), (189, 112295), (259, 81945), (315, 67377), (333, 63735), (555, 38241), (607, 34965), (777, 27315), (945, 22459), (999, 21245), (1295, 16389), (1665, 12747), (1821, 11655), (2331, 9105), (3035, 6993), (3885, 5463), (4249, 4995)]