18868615

素因数分解:

$5^1\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{43}}^1\times {\mathrm{149}}^1$

素因数の和:247

約数の個数: 32

約数和(自身を含む): 25344000

約数和(自身を除く): 6475385

約数列:

[1, 5, 19, 31, 43, 95, 149, 155, 215, 589, 745, 817, 1333, 2831, 2945, 4085, 4619, 6407, 6665, 14155, 23095, 25327, 32035, 87761, 121733, 126635, 198617, 438805, 608665, 993085, 3773723, 18868615]

約数ペア:

[(1, 18868615), (5, 3773723), (19, 993085), (31, 608665), (43, 438805), (95, 198617), (149, 126635), (155, 121733), (215, 87761), (589, 32035), (745, 25327), (817, 23095), (1333, 14155), (2831, 6665), (2945, 6407), (4085, 4619)]