991394721920

素因数分解:

$2^7\times 5^1\times {\mathrm{2029}}^1\times {\mathrm{763457}}^1$

素因数の和:765505

約数の個数: 64

約数和(自身を含む): 2371224202200

約数和(自身を除く): 1379829480280

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 320, 640, 2029, 4058, 8116, 10145, 16232, 20290, 32464, 40580, 64928, 81160, 129856, 162320, 259712, 324640, 649280, 763457, 1298560, 1526914, 3053828, 3817285, 6107656, 7634570, 12215312, 15269140, 24430624, 30538280, 48861248, 61076560, 97722496, 122153120, 244306240, 488612480, 1549054253, 3098108506, 6196217012, 7745271265, 12392434024, 15490542530, 24784868048, 30981085060, 49569736096, 61962170120, 99139472192, 123924340240, 198278944384, 247848680480, 495697360960, 991394721920]

約数ペア:

[(1, 991394721920), (2, 495697360960), (4, 247848680480), (5, 198278944384), (8, 123924340240), (10, 99139472192), (16, 61962170120), (20, 49569736096), (32, 30981085060), (40, 24784868048), (64, 15490542530), (80, 12392434024), (128, 7745271265), (160, 6196217012), (320, 3098108506), (640, 1549054253), (2029, 488612480), (4058, 244306240), (8116, 122153120), (10145, 97722496), (16232, 61076560), (20290, 48861248), (32464, 30538280), (40580, 24430624), (64928, 15269140), (81160, 12215312), (129856, 7634570), (162320, 6107656), (259712, 3817285), (324640, 3053828), (649280, 1526914), (763457, 1298560)]