21044940

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{89}}^1\times {\mathrm{563}}^1$

素因数の和:671

約数の個数: 96

約数和(自身を含む): 68221440

約数和(自身を除く): 47176500

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 60, 70, 84, 89, 105, 140, 178, 210, 267, 356, 420, 445, 534, 563, 623, 890, 1068, 1126, 1246, 1335, 1689, 1780, 1869, 2252, 2492, 2670, 2815, 3115, 3378, 3738, 3941, 5340, 5630, 6230, 6756, 7476, 7882, 8445, 9345, 11260, 11823, 12460, 15764, 16890, 18690, 19705, 23646, 33780, 37380, 39410, 47292, 50107, 59115, 78820, 100214, 118230, 150321, 200428, 236460, 250535, 300642, 350749, 501070, 601284, 701498, 751605, 1002140, 1052247, 1402996, 1503210, 1753745, 2104494, 3006420, 3507490, 4208988, 5261235, 7014980, 10522470, 21044940]

約数ペア:

[(1, 21044940), (2, 10522470), (3, 7014980), (4, 5261235), (5, 4208988), (6, 3507490), (7, 3006420), (10, 2104494), (12, 1753745), (14, 1503210), (15, 1402996), (20, 1052247), (21, 1002140), (28, 751605), (30, 701498), (35, 601284), (42, 501070), (60, 350749), (70, 300642), (84, 250535), (89, 236460), (105, 200428), (140, 150321), (178, 118230), (210, 100214), (267, 78820), (356, 59115), (420, 50107), (445, 47292), (534, 39410), (563, 37380), (623, 33780), (890, 23646), (1068, 19705), (1126, 18690), (1246, 16890), (1335, 15764), (1689, 12460), (1780, 11823), (1869, 11260), (2252, 9345), (2492, 8445), (2670, 7882), (2815, 7476), (3115, 6756), (3378, 6230), (3738, 5630), (3941, 5340)]