21995624

素因数分解:

$2^3\times 7^1\times {\mathrm{47}}^1\times {\mathrm{61}}^1\times {\mathrm{137}}^1$

素因数の和:258

約数の個数: 64

約数和(自身を含む): 49282560

約数和(自身を除く): 27286936

約数列:

[1, 2, 4, 7, 8, 14, 28, 47, 56, 61, 94, 122, 137, 188, 244, 274, 329, 376, 427, 488, 548, 658, 854, 959, 1096, 1316, 1708, 1918, 2632, 2867, 3416, 3836, 5734, 6439, 7672, 8357, 11468, 12878, 16714, 20069, 22936, 25756, 33428, 40138, 45073, 51512, 58499, 66856, 80276, 90146, 116998, 160552, 180292, 233996, 360584, 392779, 467992, 785558, 1571116, 2749453, 3142232, 5498906, 10997812, 21995624]

約数ペア:

[(1, 21995624), (2, 10997812), (4, 5498906), (7, 3142232), (8, 2749453), (14, 1571116), (28, 785558), (47, 467992), (56, 392779), (61, 360584), (94, 233996), (122, 180292), (137, 160552), (188, 116998), (244, 90146), (274, 80276), (329, 66856), (376, 58499), (427, 51512), (488, 45073), (548, 40138), (658, 33428), (854, 25756), (959, 22936), (1096, 20069), (1316, 16714), (1708, 12878), (1918, 11468), (2632, 8357), (2867, 7672), (3416, 6439), (3836, 5734)]