19211720

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{47}}^1\times {\mathrm{929}}^1$

素因数の和:998

約数の個数: 64

約数和(自身を含む): 48211200

約数和(自身を除く): 28999480

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 47, 55, 88, 94, 110, 188, 220, 235, 376, 440, 470, 517, 929, 940, 1034, 1858, 1880, 2068, 2585, 3716, 4136, 4645, 5170, 7432, 9290, 10219, 10340, 18580, 20438, 20680, 37160, 40876, 43663, 51095, 81752, 87326, 102190, 174652, 204380, 218315, 349304, 408760, 436630, 480293, 873260, 960586, 1746520, 1921172, 2401465, 3842344, 4802930, 9605860, 19211720]

約数ペア:

[(1, 19211720), (2, 9605860), (4, 4802930), (5, 3842344), (8, 2401465), (10, 1921172), (11, 1746520), (20, 960586), (22, 873260), (40, 480293), (44, 436630), (47, 408760), (55, 349304), (88, 218315), (94, 204380), (110, 174652), (188, 102190), (220, 87326), (235, 81752), (376, 51095), (440, 43663), (470, 40876), (517, 37160), (929, 20680), (940, 20438), (1034, 18580), (1858, 10340), (1880, 10219), (2068, 9290), (2585, 7432), (3716, 5170), (4136, 4645)]