20303920

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{2789}}^1$

素因数の和:2822

約数の個数: 80

約数和(自身を含む): 58121280

約数和(自身を除く): 37817360

約数列:

[1, 2, 4, 5, 7, 8, 10, 13, 14, 16, 20, 26, 28, 35, 40, 52, 56, 65, 70, 80, 91, 104, 112, 130, 140, 182, 208, 260, 280, 364, 455, 520, 560, 728, 910, 1040, 1456, 1820, 2789, 3640, 5578, 7280, 11156, 13945, 19523, 22312, 27890, 36257, 39046, 44624, 55780, 72514, 78092, 97615, 111560, 145028, 156184, 181285, 195230, 223120, 253799, 290056, 312368, 362570, 390460, 507598, 580112, 725140, 780920, 1015196, 1268995, 1450280, 1561840, 2030392, 2537990, 2900560, 4060784, 5075980, 10151960, 20303920]

約数ペア:

[(1, 20303920), (2, 10151960), (4, 5075980), (5, 4060784), (7, 2900560), (8, 2537990), (10, 2030392), (13, 1561840), (14, 1450280), (16, 1268995), (20, 1015196), (26, 780920), (28, 725140), (35, 580112), (40, 507598), (52, 390460), (56, 362570), (65, 312368), (70, 290056), (80, 253799), (91, 223120), (104, 195230), (112, 181285), (130, 156184), (140, 145028), (182, 111560), (208, 97615), (260, 78092), (280, 72514), (364, 55780), (455, 44624), (520, 39046), (560, 36257), (728, 27890), (910, 22312), (1040, 19523), (1456, 13945), (1820, 11156), (2789, 7280), (3640, 5578)]