19264288

素因数分解:

$2^5\times {\mathrm{61}}^1\times {\mathrm{71}}^1\times {\mathrm{139}}^1$

素因数の和:281

約数の個数: 48

約数和(自身を含む): 39372480

約数和(自身を除く): 20108192

約数列:

[1, 2, 4, 8, 16, 32, 61, 71, 122, 139, 142, 244, 278, 284, 488, 556, 568, 976, 1112, 1136, 1952, 2224, 2272, 4331, 4448, 8479, 8662, 9869, 16958, 17324, 19738, 33916, 34648, 39476, 67832, 69296, 78952, 135664, 138592, 157904, 271328, 315808, 602009, 1204018, 2408036, 4816072, 9632144, 19264288]

約数ペア:

[(1, 19264288), (2, 9632144), (4, 4816072), (8, 2408036), (16, 1204018), (32, 602009), (61, 315808), (71, 271328), (122, 157904), (139, 138592), (142, 135664), (244, 78952), (278, 69296), (284, 67832), (488, 39476), (556, 34648), (568, 33916), (976, 19738), (1112, 17324), (1136, 16958), (1952, 9869), (2224, 8662), (2272, 8479), (4331, 4448)]