81904555

素因数分解:

$5^1\times {\mathrm{17}}^1\times {\mathrm{29}}^1\times {\mathrm{149}}^1\times {\mathrm{223}}^1$

素因数の和:423

約数の個数: 32

約数和(自身を含む): 108864000

約数和(自身を除く): 26959445

約数列:

[1, 5, 17, 29, 85, 145, 149, 223, 493, 745, 1115, 2465, 2533, 3791, 4321, 6467, 12665, 18955, 21605, 32335, 33227, 73457, 109939, 166135, 367285, 549695, 564859, 963583, 2824295, 4817915, 16380911, 81904555]

約数ペア:

[(1, 81904555), (5, 16380911), (17, 4817915), (29, 2824295), (85, 963583), (145, 564859), (149, 549695), (223, 367285), (493, 166135), (745, 109939), (1115, 73457), (2465, 33227), (2533, 32335), (3791, 21605), (4321, 18955), (6467, 12665)]