20456480

素因数分解:

$2^5\times 5^1\times {\mathrm{11}}^1\times {\mathrm{59}}^1\times {\mathrm{197}}^1$

素因数の和:282

約数の個数: 96

約数和(自身を含む): 53887680

約数和(自身を除く): 33431200

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 32, 40, 44, 55, 59, 80, 88, 110, 118, 160, 176, 197, 220, 236, 295, 352, 394, 440, 472, 590, 649, 788, 880, 944, 985, 1180, 1298, 1576, 1760, 1888, 1970, 2167, 2360, 2596, 3152, 3245, 3940, 4334, 4720, 5192, 6304, 6490, 7880, 8668, 9440, 10384, 10835, 11623, 12980, 15760, 17336, 20768, 21670, 23246, 25960, 31520, 34672, 43340, 46492, 51920, 58115, 69344, 86680, 92984, 103840, 116230, 127853, 173360, 185968, 232460, 255706, 346720, 371936, 464920, 511412, 639265, 929840, 1022824, 1278530, 1859680, 2045648, 2557060, 4091296, 5114120, 10228240, 20456480]

約数ペア:

[(1, 20456480), (2, 10228240), (4, 5114120), (5, 4091296), (8, 2557060), (10, 2045648), (11, 1859680), (16, 1278530), (20, 1022824), (22, 929840), (32, 639265), (40, 511412), (44, 464920), (55, 371936), (59, 346720), (80, 255706), (88, 232460), (110, 185968), (118, 173360), (160, 127853), (176, 116230), (197, 103840), (220, 92984), (236, 86680), (295, 69344), (352, 58115), (394, 51920), (440, 46492), (472, 43340), (590, 34672), (649, 31520), (788, 25960), (880, 23246), (944, 21670), (985, 20768), (1180, 17336), (1298, 15760), (1576, 12980), (1760, 11623), (1888, 10835), (1970, 10384), (2167, 9440), (2360, 8668), (2596, 7880), (3152, 6490), (3245, 6304), (3940, 5192), (4334, 4720)]