21914060

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{157}}^1\times {\mathrm{997}}^1$

素因数の和:1170

約数の個数: 48

約数和(自身を含む): 52981824

約数和(自身を除く): 31067764

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 157, 314, 628, 785, 997, 1099, 1570, 1994, 2198, 3140, 3988, 4396, 4985, 5495, 6979, 9970, 10990, 13958, 19940, 21980, 27916, 34895, 69790, 139580, 156529, 313058, 626116, 782645, 1095703, 1565290, 2191406, 3130580, 4382812, 5478515, 10957030, 21914060]

約数ペア:

[(1, 21914060), (2, 10957030), (4, 5478515), (5, 4382812), (7, 3130580), (10, 2191406), (14, 1565290), (20, 1095703), (28, 782645), (35, 626116), (70, 313058), (140, 156529), (157, 139580), (314, 69790), (628, 34895), (785, 27916), (997, 21980), (1099, 19940), (1570, 13958), (1994, 10990), (2198, 9970), (3140, 6979), (3988, 5495), (4396, 4985)]