21185775

素因数分解:

$3^2\times 5^2\times {\mathrm{13}}^1\times {\mathrm{7243}}^1$

素因数の和:7272

約数の個数: 36

約数和(自身を含む): 40870648

約数和(自身を除く): 19684873

約数列:

[1, 3, 5, 9, 13, 15, 25, 39, 45, 65, 75, 117, 195, 225, 325, 585, 975, 2925, 7243, 21729, 36215, 65187, 94159, 108645, 181075, 282477, 325935, 470795, 543225, 847431, 1412385, 1629675, 2353975, 4237155, 7061925, 21185775]

約数ペア:

[(1, 21185775), (3, 7061925), (5, 4237155), (9, 2353975), (13, 1629675), (15, 1412385), (25, 847431), (39, 543225), (45, 470795), (65, 325935), (75, 282477), (117, 181075), (195, 108645), (225, 94159), (325, 65187), (585, 36215), (975, 21729), (2925, 7243)]