20171840

素因数分解:

$2^6\times 5^1\times {\mathrm{13}}^2\times {\mathrm{373}}^1$

素因数の和:416

約数の個数: 84

約数和(自身を含む): 52152804

約数和(自身を除く): 31980964

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 32, 40, 52, 64, 65, 80, 104, 130, 160, 169, 208, 260, 320, 338, 373, 416, 520, 676, 746, 832, 845, 1040, 1352, 1492, 1690, 1865, 2080, 2704, 2984, 3380, 3730, 4160, 4849, 5408, 5968, 6760, 7460, 9698, 10816, 11936, 13520, 14920, 19396, 23872, 24245, 27040, 29840, 38792, 48490, 54080, 59680, 63037, 77584, 96980, 119360, 126074, 155168, 193960, 252148, 310336, 315185, 387920, 504296, 630370, 775840, 1008592, 1260740, 1551680, 2017184, 2521480, 4034368, 5042960, 10085920, 20171840]

約数ペア:

[(1, 20171840), (2, 10085920), (4, 5042960), (5, 4034368), (8, 2521480), (10, 2017184), (13, 1551680), (16, 1260740), (20, 1008592), (26, 775840), (32, 630370), (40, 504296), (52, 387920), (64, 315185), (65, 310336), (80, 252148), (104, 193960), (130, 155168), (160, 126074), (169, 119360), (208, 96980), (260, 77584), (320, 63037), (338, 59680), (373, 54080), (416, 48490), (520, 38792), (676, 29840), (746, 27040), (832, 24245), (845, 23872), (1040, 19396), (1352, 14920), (1492, 13520), (1690, 11936), (1865, 10816), (2080, 9698), (2704, 7460), (2984, 6760), (3380, 5968), (3730, 5408), (4160, 4849)]