20197780900

素因数分解:

$2^2\times 5^2\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{966401}}^1$

素因数の和:966445

約数の個数: 72

約数和(自身を含む): 50330216160

約数和(自身を除く): 30132435260

約数列:

[1, 2, 4, 5, 10, 11, 19, 20, 22, 25, 38, 44, 50, 55, 76, 95, 100, 110, 190, 209, 220, 275, 380, 418, 475, 550, 836, 950, 1045, 1100, 1900, 2090, 4180, 5225, 10450, 20900, 966401, 1932802, 3865604, 4832005, 9664010, 10630411, 18361619, 19328020, 21260822, 24160025, 36723238, 42521644, 48320050, 53152055, 73446476, 91808095, 96640100, 106304110, 183616190, 201977809, 212608220, 265760275, 367232380, 403955618, 459040475, 531520550, 807911236, 918080950, 1009889045, 1063041100, 1836161900, 2019778090, 4039556180, 5049445225, 10098890450, 20197780900]

約数ペア:

[(1, 20197780900), (2, 10098890450), (4, 5049445225), (5, 4039556180), (10, 2019778090), (11, 1836161900), (19, 1063041100), (20, 1009889045), (22, 918080950), (25, 807911236), (38, 531520550), (44, 459040475), (50, 403955618), (55, 367232380), (76, 265760275), (95, 212608220), (100, 201977809), (110, 183616190), (190, 106304110), (209, 96640100), (220, 91808095), (275, 73446476), (380, 53152055), (418, 48320050), (475, 42521644), (550, 36723238), (836, 24160025), (950, 21260822), (1045, 19328020), (1100, 18361619), (1900, 10630411), (2090, 9664010), (4180, 4832005), (5225, 3865604), (10450, 1932802), (20900, 966401)]