21890715

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{11}}^2\times {\mathrm{1723}}^1$

素因数の和:1760

約数の個数: 48

約数和(自身を含む): 44024064

約数和(自身を除く): 22133349

約数列:

[1, 3, 5, 7, 11, 15, 21, 33, 35, 55, 77, 105, 121, 165, 231, 363, 385, 605, 847, 1155, 1723, 1815, 2541, 4235, 5169, 8615, 12061, 12705, 18953, 25845, 36183, 56859, 60305, 94765, 132671, 180915, 208483, 284295, 398013, 625449, 663355, 1042415, 1459381, 1990065, 3127245, 4378143, 7296905, 21890715]

約数ペア:

[(1, 21890715), (3, 7296905), (5, 4378143), (7, 3127245), (11, 1990065), (15, 1459381), (21, 1042415), (33, 663355), (35, 625449), (55, 398013), (77, 284295), (105, 208483), (121, 180915), (165, 132671), (231, 94765), (363, 60305), (385, 56859), (605, 36183), (847, 25845), (1155, 18953), (1723, 12705), (1815, 12061), (2541, 8615), (4235, 5169)]