18731860

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{67}}^1\times {\mathrm{1997}}^1$

素因数の和:2080

約数の個数: 48

約数和(自身を含む): 45650304

約数和(自身を除く): 26918444

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 67, 70, 134, 140, 268, 335, 469, 670, 938, 1340, 1876, 1997, 2345, 3994, 4690, 7988, 9380, 9985, 13979, 19970, 27958, 39940, 55916, 69895, 133799, 139790, 267598, 279580, 535196, 668995, 936593, 1337990, 1873186, 2675980, 3746372, 4682965, 9365930, 18731860]

約数ペア:

[(1, 18731860), (2, 9365930), (4, 4682965), (5, 3746372), (7, 2675980), (10, 1873186), (14, 1337990), (20, 936593), (28, 668995), (35, 535196), (67, 279580), (70, 267598), (134, 139790), (140, 133799), (268, 69895), (335, 55916), (469, 39940), (670, 27958), (938, 19970), (1340, 13979), (1876, 9985), (1997, 9380), (2345, 7988), (3994, 4690)]