21154791

素因数分解:

$3^1\times 7^1\times {\mathrm{53}}^1\times {\mathrm{83}}^1\times {\mathrm{229}}^1$

素因数の和:375

約数の個数: 32

約数和(自身を含む): 33384960

約数和(自身を除く): 12230169

約数列:

[1, 3, 7, 21, 53, 83, 159, 229, 249, 371, 581, 687, 1113, 1603, 1743, 4399, 4809, 12137, 13197, 19007, 30793, 36411, 57021, 84959, 92379, 133049, 254877, 399147, 1007371, 3022113, 7051597, 21154791]

約数ペア:

[(1, 21154791), (3, 7051597), (7, 3022113), (21, 1007371), (53, 399147), (83, 254877), (159, 133049), (229, 92379), (249, 84959), (371, 57021), (581, 36411), (687, 30793), (1113, 19007), (1603, 13197), (1743, 12137), (4399, 4809)]