21783235

素因数分解:

$5^1\times {\mathrm{31}}^1\times {\mathrm{313}}^1\times {\mathrm{449}}^1$

素因数の和:798

約数の個数: 16

約数和(自身を含む): 27129600

約数和(自身を除く): 5346365

約数列:

[1, 5, 31, 155, 313, 449, 1565, 2245, 9703, 13919, 48515, 69595, 140537, 702685, 4356647, 21783235]

約数ペア:

[(1, 21783235), (5, 4356647), (31, 702685), (155, 140537), (313, 69595), (449, 48515), (1565, 13919), (2245, 9703)]