21328755

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{71}}^1\times {\mathrm{2861}}^1$

素因数の和:2947

約数の個数: 32

約数和(自身を含む): 39564288

約数和(自身を除く): 18235533

約数列:

[1, 3, 5, 7, 15, 21, 35, 71, 105, 213, 355, 497, 1065, 1491, 2485, 2861, 7455, 8583, 14305, 20027, 42915, 60081, 100135, 203131, 300405, 609393, 1015655, 1421917, 3046965, 4265751, 7109585, 21328755]

約数ペア:

[(1, 21328755), (3, 7109585), (5, 4265751), (7, 3046965), (15, 1421917), (21, 1015655), (35, 609393), (71, 300405), (105, 203131), (213, 100135), (355, 60081), (497, 42915), (1065, 20027), (1491, 14305), (2485, 8583), (2861, 7455)]