81215680

素因数分解:

$2^6\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{2789}}^1$

素因数の和:2826

約数の個数: 112

約数和(自身を含む): 238109760

約数和(自身を除く): 156894080

約数列:

[1, 2, 4, 5, 7, 8, 10, 13, 14, 16, 20, 26, 28, 32, 35, 40, 52, 56, 64, 65, 70, 80, 91, 104, 112, 130, 140, 160, 182, 208, 224, 260, 280, 320, 364, 416, 448, 455, 520, 560, 728, 832, 910, 1040, 1120, 1456, 1820, 2080, 2240, 2789, 2912, 3640, 4160, 5578, 5824, 7280, 11156, 13945, 14560, 19523, 22312, 27890, 29120, 36257, 39046, 44624, 55780, 72514, 78092, 89248, 97615, 111560, 145028, 156184, 178496, 181285, 195230, 223120, 253799, 290056, 312368, 362570, 390460, 446240, 507598, 580112, 624736, 725140, 780920, 892480, 1015196, 1160224, 1249472, 1268995, 1450280, 1561840, 2030392, 2320448, 2537990, 2900560, 3123680, 4060784, 5075980, 5801120, 6247360, 8121568, 10151960, 11602240, 16243136, 20303920, 40607840, 81215680]

約数ペア:

[(1, 81215680), (2, 40607840), (4, 20303920), (5, 16243136), (7, 11602240), (8, 10151960), (10, 8121568), (13, 6247360), (14, 5801120), (16, 5075980), (20, 4060784), (26, 3123680), (28, 2900560), (32, 2537990), (35, 2320448), (40, 2030392), (52, 1561840), (56, 1450280), (64, 1268995), (65, 1249472), (70, 1160224), (80, 1015196), (91, 892480), (104, 780920), (112, 725140), (130, 624736), (140, 580112), (160, 507598), (182, 446240), (208, 390460), (224, 362570), (260, 312368), (280, 290056), (320, 253799), (364, 223120), (416, 195230), (448, 181285), (455, 178496), (520, 156184), (560, 145028), (728, 111560), (832, 97615), (910, 89248), (1040, 78092), (1120, 72514), (1456, 55780), (1820, 44624), (2080, 39046), (2240, 36257), (2789, 29120), (2912, 27890), (3640, 22312), (4160, 19523), (5578, 14560), (5824, 13945), (7280, 11156)]