21082815

素因数分解:

$3^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{41}}^1\times {\mathrm{293}}^1$

素因数の和:361

約数の個数: 64

約数和(自身を含む): 41489280

約数和(自身を除く): 20406465

約数列:

[1, 3, 5, 9, 13, 15, 27, 39, 41, 45, 65, 117, 123, 135, 195, 205, 293, 351, 369, 533, 585, 615, 879, 1107, 1465, 1599, 1755, 1845, 2637, 2665, 3809, 4395, 4797, 5535, 7911, 7995, 11427, 12013, 13185, 14391, 19045, 23985, 34281, 36039, 39555, 57135, 60065, 71955, 102843, 108117, 156169, 171405, 180195, 324351, 468507, 514215, 540585, 780845, 1405521, 1621755, 2342535, 4216563, 7027605, 21082815]

約数ペア:

[(1, 21082815), (3, 7027605), (5, 4216563), (9, 2342535), (13, 1621755), (15, 1405521), (27, 780845), (39, 540585), (41, 514215), (45, 468507), (65, 324351), (117, 180195), (123, 171405), (135, 156169), (195, 108117), (205, 102843), (293, 71955), (351, 60065), (369, 57135), (533, 39555), (585, 36039), (615, 34281), (879, 23985), (1107, 19045), (1465, 14391), (1599, 13185), (1755, 12013), (1845, 11427), (2637, 7995), (2665, 7911), (3809, 5535), (4395, 4797)]