19928480

素因数分解:

$2^5\times 5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^2\times {\mathrm{67}}^1$

素因数の和:119

約数の個数: 144

約数和(自身を含む): 56445984

約数和(自身を除く): 36517504

約数列:

[1, 2, 4, 5, 8, 10, 11, 13, 16, 20, 22, 26, 32, 40, 44, 52, 55, 65, 67, 80, 88, 104, 110, 130, 134, 143, 160, 169, 176, 208, 220, 260, 268, 286, 335, 338, 352, 416, 440, 520, 536, 572, 670, 676, 715, 737, 845, 871, 880, 1040, 1072, 1144, 1340, 1352, 1430, 1474, 1690, 1742, 1760, 1859, 2080, 2144, 2288, 2680, 2704, 2860, 2948, 3380, 3484, 3685, 3718, 4355, 4576, 5360, 5408, 5720, 5896, 6760, 6968, 7370, 7436, 8710, 9295, 9581, 10720, 11323, 11440, 11792, 13520, 13936, 14740, 14872, 17420, 18590, 19162, 22646, 22880, 23584, 27040, 27872, 29480, 29744, 34840, 37180, 38324, 45292, 47905, 56615, 58960, 59488, 69680, 74360, 76648, 90584, 95810, 113230, 117920, 124553, 139360, 148720, 153296, 181168, 191620, 226460, 249106, 297440, 306592, 362336, 383240, 452920, 498212, 622765, 766480, 905840, 996424, 1245530, 1532960, 1811680, 1992848, 2491060, 3985696, 4982120, 9964240, 19928480]

約数ペア:

[(1, 19928480), (2, 9964240), (4, 4982120), (5, 3985696), (8, 2491060), (10, 1992848), (11, 1811680), (13, 1532960), (16, 1245530), (20, 996424), (22, 905840), (26, 766480), (32, 622765), (40, 498212), (44, 452920), (52, 383240), (55, 362336), (65, 306592), (67, 297440), (80, 249106), (88, 226460), (104, 191620), (110, 181168), (130, 153296), (134, 148720), (143, 139360), (160, 124553), (169, 117920), (176, 113230), (208, 95810), (220, 90584), (260, 76648), (268, 74360), (286, 69680), (335, 59488), (338, 58960), (352, 56615), (416, 47905), (440, 45292), (520, 38324), (536, 37180), (572, 34840), (670, 29744), (676, 29480), (715, 27872), (737, 27040), (845, 23584), (871, 22880), (880, 22646), (1040, 19162), (1072, 18590), (1144, 17420), (1340, 14872), (1352, 14740), (1430, 13936), (1474, 13520), (1690, 11792), (1742, 11440), (1760, 11323), (1859, 10720), (2080, 9581), (2144, 9295), (2288, 8710), (2680, 7436), (2704, 7370), (2860, 6968), (2948, 6760), (3380, 5896), (3484, 5720), (3685, 5408), (3718, 5360), (4355, 4576)]