21053193

素因数分解:

$3^1\times 7^2\times {\mathrm{197}}^1\times {\mathrm{727}}^1$

素因数の和:941

約数の個数: 24

約数和(自身を含む): 32864832

約数和(自身を除く): 11811639

約数列:

[1, 3, 7, 21, 49, 147, 197, 591, 727, 1379, 2181, 4137, 5089, 9653, 15267, 28959, 35623, 106869, 143219, 429657, 1002533, 3007599, 7017731, 21053193]

約数ペア:

[(1, 21053193), (3, 7017731), (7, 3007599), (21, 1002533), (49, 429657), (147, 143219), (197, 106869), (591, 35623), (727, 28959), (1379, 15267), (2181, 9653), (4137, 5089)]