21131285

素因数分解:

$5^1\times 7^1\times {\mathrm{29}}^1\times {\mathrm{109}}^1\times {\mathrm{191}}^1$

素因数の和:341

約数の個数: 32

約数和(自身を含む): 30412800

約数和(自身を除く): 9281515

約数列:

[1, 5, 7, 29, 35, 109, 145, 191, 203, 545, 763, 955, 1015, 1337, 3161, 3815, 5539, 6685, 15805, 20819, 22127, 27695, 38773, 104095, 110635, 145733, 193865, 603751, 728665, 3018755, 4226257, 21131285]

約数ペア:

[(1, 21131285), (5, 4226257), (7, 3018755), (29, 728665), (35, 603751), (109, 193865), (145, 145733), (191, 110635), (203, 104095), (545, 38773), (763, 27695), (955, 22127), (1015, 20819), (1337, 15805), (3161, 6685), (3815, 5539)]