721865920

素因数分解:

$2^6\times 5^1\times {\mathrm{139}}^1\times {\mathrm{16229}}^1$

素因数の和:16385

約数の個数: 56

約数和(自身を含む): 1731416400

約数和(自身を除く): 1009550480

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 139, 160, 278, 320, 556, 695, 1112, 1390, 2224, 2780, 4448, 5560, 8896, 11120, 16229, 22240, 32458, 44480, 64916, 81145, 129832, 162290, 259664, 324580, 519328, 649160, 1038656, 1298320, 2255831, 2596640, 4511662, 5193280, 9023324, 11279155, 18046648, 22558310, 36093296, 45116620, 72186592, 90233240, 144373184, 180466480, 360932960, 721865920]

約数ペア:

[(1, 721865920), (2, 360932960), (4, 180466480), (5, 144373184), (8, 90233240), (10, 72186592), (16, 45116620), (20, 36093296), (32, 22558310), (40, 18046648), (64, 11279155), (80, 9023324), (139, 5193280), (160, 4511662), (278, 2596640), (320, 2255831), (556, 1298320), (695, 1038656), (1112, 649160), (1390, 519328), (2224, 324580), (2780, 259664), (4448, 162290), (5560, 129832), (8896, 81145), (11120, 64916), (16229, 44480), (22240, 32458)]