28081040

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^2\times {\mathrm{31}}^1\times {\mathrm{67}}^1$

素因数の和:137

約数の個数: 120

約数和(自身を含む): 74066688

約数和(自身を除く): 45985648

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 31, 40, 52, 62, 65, 67, 80, 104, 124, 130, 134, 155, 169, 208, 248, 260, 268, 310, 335, 338, 403, 496, 520, 536, 620, 670, 676, 806, 845, 871, 1040, 1072, 1240, 1340, 1352, 1612, 1690, 1742, 2015, 2077, 2480, 2680, 2704, 3224, 3380, 3484, 4030, 4154, 4355, 5239, 5360, 6448, 6760, 6968, 8060, 8308, 8710, 10385, 10478, 11323, 13520, 13936, 16120, 16616, 17420, 20770, 20956, 22646, 26195, 27001, 32240, 33232, 34840, 41540, 41912, 45292, 52390, 54002, 56615, 69680, 83080, 83824, 90584, 104780, 108004, 113230, 135005, 166160, 181168, 209560, 216008, 226460, 270010, 351013, 419120, 432016, 452920, 540020, 702026, 905840, 1080040, 1404052, 1755065, 2160080, 2808104, 3510130, 5616208, 7020260, 14040520, 28081040]

約数ペア:

[(1, 28081040), (2, 14040520), (4, 7020260), (5, 5616208), (8, 3510130), (10, 2808104), (13, 2160080), (16, 1755065), (20, 1404052), (26, 1080040), (31, 905840), (40, 702026), (52, 540020), (62, 452920), (65, 432016), (67, 419120), (80, 351013), (104, 270010), (124, 226460), (130, 216008), (134, 209560), (155, 181168), (169, 166160), (208, 135005), (248, 113230), (260, 108004), (268, 104780), (310, 90584), (335, 83824), (338, 83080), (403, 69680), (496, 56615), (520, 54002), (536, 52390), (620, 45292), (670, 41912), (676, 41540), (806, 34840), (845, 33232), (871, 32240), (1040, 27001), (1072, 26195), (1240, 22646), (1340, 20956), (1352, 20770), (1612, 17420), (1690, 16616), (1742, 16120), (2015, 13936), (2077, 13520), (2480, 11323), (2680, 10478), (2704, 10385), (3224, 8710), (3380, 8308), (3484, 8060), (4030, 6968), (4154, 6760), (4355, 6448), (5239, 5360)]