21236705

素因数分解:

$5^1\times 7^1\times {\mathrm{23}}^2\times {\mathrm{31}}^1\times {\mathrm{37}}^1$

素因数の和:126

約数の個数: 48

約数和(自身を含む): 32277504

約数和(自身を除く): 11040799

約数列:

[1, 5, 7, 23, 31, 35, 37, 115, 155, 161, 185, 217, 259, 529, 713, 805, 851, 1085, 1147, 1295, 2645, 3565, 3703, 4255, 4991, 5735, 5957, 8029, 16399, 18515, 19573, 24955, 26381, 29785, 40145, 81995, 97865, 114793, 131905, 137011, 184667, 573965, 606763, 685055, 923335, 3033815, 4247341, 21236705]

約数ペア:

[(1, 21236705), (5, 4247341), (7, 3033815), (23, 923335), (31, 685055), (35, 606763), (37, 573965), (115, 184667), (155, 137011), (161, 131905), (185, 114793), (217, 97865), (259, 81995), (529, 40145), (713, 29785), (805, 26381), (851, 24955), (1085, 19573), (1147, 18515), (1295, 16399), (2645, 8029), (3565, 5957), (3703, 5735), (4255, 4991)]