20804927650

素因数分解:

$2^1\times 5^2\times {\mathrm{13}}^1\times {\mathrm{71}}^1\times {\mathrm{450811}}^1$

素因数の和:450907

約数の個数: 48

約数和(自身を含む): 42260920128

約数和(自身を除く): 21455992478

約数列:

[1, 2, 5, 10, 13, 25, 26, 50, 65, 71, 130, 142, 325, 355, 650, 710, 923, 1775, 1846, 3550, 4615, 9230, 23075, 46150, 450811, 901622, 2254055, 4508110, 5860543, 11270275, 11721086, 22540550, 29302715, 32007581, 58605430, 64015162, 146513575, 160037905, 293027150, 320075810, 416098553, 800189525, 832197106, 1600379050, 2080492765, 4160985530, 10402463825, 20804927650]

約数ペア:

[(1, 20804927650), (2, 10402463825), (5, 4160985530), (10, 2080492765), (13, 1600379050), (25, 832197106), (26, 800189525), (50, 416098553), (65, 320075810), (71, 293027150), (130, 160037905), (142, 146513575), (325, 64015162), (355, 58605430), (650, 32007581), (710, 29302715), (923, 22540550), (1775, 11721086), (1846, 11270275), (3550, 5860543), (4615, 4508110), (9230, 2254055), (23075, 901622), (46150, 450811)]