21085425

素因数分解:

$3^2\times 5^2\times {\mathrm{31}}^1\times {\mathrm{3023}}^1$

素因数の和:3070

約数の個数: 36

約数和(自身を含む): 38997504

約数和(自身を除く): 17912079

約数列:

[1, 3, 5, 9, 15, 25, 31, 45, 75, 93, 155, 225, 279, 465, 775, 1395, 2325, 3023, 6975, 9069, 15115, 27207, 45345, 75575, 93713, 136035, 226725, 281139, 468565, 680175, 843417, 1405695, 2342825, 4217085, 7028475, 21085425]

約数ペア:

[(1, 21085425), (3, 7028475), (5, 4217085), (9, 2342825), (15, 1405695), (25, 843417), (31, 680175), (45, 468565), (75, 281139), (93, 226725), (155, 136035), (225, 93713), (279, 75575), (465, 45345), (775, 27207), (1395, 15115), (2325, 9069), (3023, 6975)]