21431277

素因数分解:

$3^3\times 7^2\times {\mathrm{97}}^1\times {\mathrm{167}}^1$

素因数の和:287

約数の個数: 48

約数和(自身を含む): 37537920

約数和(自身を除く): 16106643

約数列:

[1, 3, 7, 9, 21, 27, 49, 63, 97, 147, 167, 189, 291, 441, 501, 679, 873, 1169, 1323, 1503, 2037, 2619, 3507, 4509, 4753, 6111, 8183, 10521, 14259, 16199, 18333, 24549, 31563, 42777, 48597, 73647, 113393, 128331, 145791, 220941, 340179, 437373, 793751, 1020537, 2381253, 3061611, 7143759, 21431277]

約数ペア:

[(1, 21431277), (3, 7143759), (7, 3061611), (9, 2381253), (21, 1020537), (27, 793751), (49, 437373), (63, 340179), (97, 220941), (147, 145791), (167, 128331), (189, 113393), (291, 73647), (441, 48597), (501, 42777), (679, 31563), (873, 24549), (1169, 18333), (1323, 16199), (1503, 14259), (2037, 10521), (2619, 8183), (3507, 6111), (4509, 4753)]