19988265

素因数分解:

$3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{23}}^2\times {\mathrm{229}}^1$

素因数の和:294

約数の個数: 48

約数和(自身を含む): 36630720

約数和(自身を除く): 16642455

約数列:

[1, 3, 5, 11, 15, 23, 33, 55, 69, 115, 165, 229, 253, 345, 529, 687, 759, 1145, 1265, 1587, 2519, 2645, 3435, 3795, 5267, 5819, 7557, 7935, 12595, 15801, 17457, 26335, 29095, 37785, 57937, 79005, 87285, 121141, 173811, 289685, 363423, 605705, 869055, 1332551, 1817115, 3997653, 6662755, 19988265]

約数ペア:

[(1, 19988265), (3, 6662755), (5, 3997653), (11, 1817115), (15, 1332551), (23, 869055), (33, 605705), (55, 363423), (69, 289685), (115, 173811), (165, 121141), (229, 87285), (253, 79005), (345, 57937), (529, 37785), (687, 29095), (759, 26335), (1145, 17457), (1265, 15801), (1587, 12595), (2519, 7935), (2645, 7557), (3435, 5819), (3795, 5267)]