20722072

素因数分解:

$2^3\times 7^1\times {\mathrm{37}}^1\times {\mathrm{73}}^1\times {\mathrm{137}}^1$

素因数の和:260

約数の個数: 64

約数和(自身を含む): 46566720

約数和(自身を除く): 25844648

約数列:

[1, 2, 4, 7, 8, 14, 28, 37, 56, 73, 74, 137, 146, 148, 259, 274, 292, 296, 511, 518, 548, 584, 959, 1022, 1036, 1096, 1918, 2044, 2072, 2701, 3836, 4088, 5069, 5402, 7672, 10001, 10138, 10804, 18907, 20002, 20276, 21608, 35483, 37814, 40004, 40552, 70007, 70966, 75628, 80008, 140014, 141932, 151256, 280028, 283864, 370037, 560056, 740074, 1480148, 2590259, 2960296, 5180518, 10361036, 20722072]

約数ペア:

[(1, 20722072), (2, 10361036), (4, 5180518), (7, 2960296), (8, 2590259), (14, 1480148), (28, 740074), (37, 560056), (56, 370037), (73, 283864), (74, 280028), (137, 151256), (146, 141932), (148, 140014), (259, 80008), (274, 75628), (292, 70966), (296, 70007), (511, 40552), (518, 40004), (548, 37814), (584, 35483), (959, 21608), (1022, 20276), (1036, 20002), (1096, 18907), (1918, 10804), (2044, 10138), (2072, 10001), (2701, 7672), (3836, 5402), (4088, 5069)]