21780105

素因数分解:

$3^1\times 5^1\times {\mathrm{313}}^1\times {\mathrm{4639}}^1$

素因数の和:4960

約数の個数: 16

約数和(自身を含む): 34967040

約数和(自身を除く): 13186935

約数列:

[1, 3, 5, 15, 313, 939, 1565, 4639, 4695, 13917, 23195, 69585, 1452007, 4356021, 7260035, 21780105]

約数ペア:

[(1, 21780105), (3, 7260035), (5, 4356021), (15, 1452007), (313, 69585), (939, 23195), (1565, 13917), (4639, 4695)]