81251720

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{47}}^1\times {\mathrm{3929}}^1$

素因数の和:3998

約数の個数: 64

約数和(自身を含む): 203731200

約数和(自身を除く): 122479480

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, 940, 1034, 1880, 2068, 2585, 3929, 4136, 5170, 7858, 10340, 15716, 19645, 20680, 31432, 39290, 43219, 78580, 86438, 157160, 172876, 184663, 216095, 345752, 369326, 432190, 738652, 864380, 923315, 1477304, 1728760, 1846630, 2031293, 3693260, 4062586, 7386520, 8125172, 10156465, 16250344, 20312930, 40625860, 81251720]

約数ペア:

[(1, 81251720), (2, 40625860), (4, 20312930), (5, 16250344), (8, 10156465), (10, 8125172), (11, 7386520), (20, 4062586), (22, 3693260), (40, 2031293), (44, 1846630), (47, 1728760), (55, 1477304), (88, 923315), (94, 864380), (110, 738652), (188, 432190), (220, 369326), (235, 345752), (376, 216095), (440, 184663), (470, 172876), (517, 157160), (940, 86438), (1034, 78580), (1880, 43219), (2068, 39290), (2585, 31432), (3929, 20680), (4136, 19645), (5170, 15716), (7858, 10340)]