21740888

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{61}}^1\times {\mathrm{149}}^1$

素因数の和:252

約数の個数: 64

約数和(自身を含む): 46872000

約数和(自身を除く): 25131112

約数列:

[1, 2, 4, 8, 13, 23, 26, 46, 52, 61, 92, 104, 122, 149, 184, 244, 298, 299, 488, 596, 598, 793, 1192, 1196, 1403, 1586, 1937, 2392, 2806, 3172, 3427, 3874, 5612, 6344, 6854, 7748, 9089, 11224, 13708, 15496, 18178, 18239, 27416, 36356, 36478, 44551, 72712, 72956, 89102, 118157, 145912, 178204, 209047, 236314, 356408, 418094, 472628, 836188, 945256, 1672376, 2717611, 5435222, 10870444, 21740888]

約数ペア:

[(1, 21740888), (2, 10870444), (4, 5435222), (8, 2717611), (13, 1672376), (23, 945256), (26, 836188), (46, 472628), (52, 418094), (61, 356408), (92, 236314), (104, 209047), (122, 178204), (149, 145912), (184, 118157), (244, 89102), (298, 72956), (299, 72712), (488, 44551), (596, 36478), (598, 36356), (793, 27416), (1192, 18239), (1196, 18178), (1403, 15496), (1586, 13708), (1937, 11224), (2392, 9089), (2806, 7748), (3172, 6854), (3427, 6344), (3874, 5612)]