21571040

素因数分解:

$2^5\times 5^1\times {\mathrm{31}}^1\times {\mathrm{4349}}^1$

素因数の和:4395

約数の個数: 48

約数和(自身を含む): 52617600

約数和(自身を除く): 31046560

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 32, 40, 62, 80, 124, 155, 160, 248, 310, 496, 620, 992, 1240, 2480, 4349, 4960, 8698, 17396, 21745, 34792, 43490, 69584, 86980, 134819, 139168, 173960, 269638, 347920, 539276, 674095, 695840, 1078552, 1348190, 2157104, 2696380, 4314208, 5392760, 10785520, 21571040]

約数ペア:

[(1, 21571040), (2, 10785520), (4, 5392760), (5, 4314208), (8, 2696380), (10, 2157104), (16, 1348190), (20, 1078552), (31, 695840), (32, 674095), (40, 539276), (62, 347920), (80, 269638), (124, 173960), (155, 139168), (160, 134819), (248, 86980), (310, 69584), (496, 43490), (620, 34792), (992, 21745), (1240, 17396), (2480, 8698), (4349, 4960)]