20720784

素因数分解:

$2^4\times 3^1\times 7^1\times {\mathrm{83}}^1\times {\mathrm{743}}^1$

素因数の和:844

約数の個数: 80

約数和(自身を含む): 61996032

約数和(自身を除く): 41275248

約数列:

[1, 2, 3, 4, 6, 7, 8, 12, 14, 16, 21, 24, 28, 42, 48, 56, 83, 84, 112, 166, 168, 249, 332, 336, 498, 581, 664, 743, 996, 1162, 1328, 1486, 1743, 1992, 2229, 2324, 2972, 3486, 3984, 4458, 4648, 5201, 5944, 6972, 8916, 9296, 10402, 11888, 13944, 15603, 17832, 20804, 27888, 31206, 35664, 41608, 61669, 62412, 83216, 123338, 124824, 185007, 246676, 249648, 370014, 431683, 493352, 740028, 863366, 986704, 1295049, 1480056, 1726732, 2590098, 2960112, 3453464, 5180196, 6906928, 10360392, 20720784]

約数ペア:

[(1, 20720784), (2, 10360392), (3, 6906928), (4, 5180196), (6, 3453464), (7, 2960112), (8, 2590098), (12, 1726732), (14, 1480056), (16, 1295049), (21, 986704), (24, 863366), (28, 740028), (42, 493352), (48, 431683), (56, 370014), (83, 249648), (84, 246676), (112, 185007), (166, 124824), (168, 123338), (249, 83216), (332, 62412), (336, 61669), (498, 41608), (581, 35664), (664, 31206), (743, 27888), (996, 20804), (1162, 17832), (1328, 15603), (1486, 13944), (1743, 11888), (1992, 10402), (2229, 9296), (2324, 8916), (2972, 6972), (3486, 5944), (3984, 5201), (4458, 4648)]