21490595

素因数分解:

$5^1\times 7^1\times {\mathrm{29}}^1\times {\mathrm{31}}^1\times {\mathrm{683}}^1$

素因数の和:755

約数の個数: 32

約数和(自身を含む): 31518720

約数和(自身を除く): 10028125

約数列:

[1, 5, 7, 29, 31, 35, 145, 155, 203, 217, 683, 899, 1015, 1085, 3415, 4495, 4781, 6293, 19807, 21173, 23905, 31465, 99035, 105865, 138649, 148211, 614017, 693245, 741055, 3070085, 4298119, 21490595]

約数ペア:

[(1, 21490595), (5, 4298119), (7, 3070085), (29, 741055), (31, 693245), (35, 614017), (145, 148211), (155, 138649), (203, 105865), (217, 99035), (683, 31465), (899, 23905), (1015, 21173), (1085, 19807), (3415, 6293), (4495, 4781)]