21388220

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{37}}^1\times {\mathrm{4129}}^1$

素因数の和:4182

約数の個数: 48

約数和(自身を含む): 52731840

約数和(自身を除く): 31343620

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 37, 70, 74, 140, 148, 185, 259, 370, 518, 740, 1036, 1295, 2590, 4129, 5180, 8258, 16516, 20645, 28903, 41290, 57806, 82580, 115612, 144515, 152773, 289030, 305546, 578060, 611092, 763865, 1069411, 1527730, 2138822, 3055460, 4277644, 5347055, 10694110, 21388220]

約数ペア:

[(1, 21388220), (2, 10694110), (4, 5347055), (5, 4277644), (7, 3055460), (10, 2138822), (14, 1527730), (20, 1069411), (28, 763865), (35, 611092), (37, 578060), (70, 305546), (74, 289030), (140, 152773), (148, 144515), (185, 115612), (259, 82580), (370, 57806), (518, 41290), (740, 28903), (1036, 20645), (1295, 16516), (2590, 8258), (4129, 5180)]