28640040

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{1669}}^1$

素因数の和:1707

約数の個数: 128

約数和(自身を含む): 101001600

約数和(自身を除く): 72361560

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 11, 12, 13, 15, 20, 22, 24, 26, 30, 33, 39, 40, 44, 52, 55, 60, 65, 66, 78, 88, 104, 110, 120, 130, 132, 143, 156, 165, 195, 220, 260, 264, 286, 312, 330, 390, 429, 440, 520, 572, 660, 715, 780, 858, 1144, 1320, 1430, 1560, 1669, 1716, 2145, 2860, 3338, 3432, 4290, 5007, 5720, 6676, 8345, 8580, 10014, 13352, 16690, 17160, 18359, 20028, 21697, 25035, 33380, 36718, 40056, 43394, 50070, 55077, 65091, 66760, 73436, 86788, 91795, 100140, 108485, 110154, 130182, 146872, 173576, 183590, 200280, 216970, 220308, 238667, 260364, 275385, 325455, 367180, 433940, 440616, 477334, 520728, 550770, 650910, 716001, 734360, 867880, 954668, 1101540, 1193335, 1301820, 1432002, 1909336, 2203080, 2386670, 2603640, 2864004, 3580005, 4773340, 5728008, 7160010, 9546680, 14320020, 28640040]

約数ペア:

[(1, 28640040), (2, 14320020), (3, 9546680), (4, 7160010), (5, 5728008), (6, 4773340), (8, 3580005), (10, 2864004), (11, 2603640), (12, 2386670), (13, 2203080), (15, 1909336), (20, 1432002), (22, 1301820), (24, 1193335), (26, 1101540), (30, 954668), (33, 867880), (39, 734360), (40, 716001), (44, 650910), (52, 550770), (55, 520728), (60, 477334), (65, 440616), (66, 433940), (78, 367180), (88, 325455), (104, 275385), (110, 260364), (120, 238667), (130, 220308), (132, 216970), (143, 200280), (156, 183590), (165, 173576), (195, 146872), (220, 130182), (260, 110154), (264, 108485), (286, 100140), (312, 91795), (330, 86788), (390, 73436), (429, 66760), (440, 65091), (520, 55077), (572, 50070), (660, 43394), (715, 40056), (780, 36718), (858, 33380), (1144, 25035), (1320, 21697), (1430, 20028), (1560, 18359), (1669, 17160), (1716, 16690), (2145, 13352), (2860, 10014), (3338, 8580), (3432, 8345), (4290, 6676), (5007, 5720)]