21402759

素因数分解:

$3^1\times 7^2\times {\mathrm{19}}^1\times {\mathrm{79}}^1\times {\mathrm{97}}^1$

素因数の和:212

約数の個数: 48

約数和(自身を含む): 35750400

約数和(自身を除く): 14347641

約数列:

[1, 3, 7, 19, 21, 49, 57, 79, 97, 133, 147, 237, 291, 399, 553, 679, 931, 1501, 1659, 1843, 2037, 2793, 3871, 4503, 4753, 5529, 7663, 10507, 11613, 12901, 14259, 22989, 31521, 38703, 53641, 73549, 90307, 145597, 160923, 220647, 270921, 375487, 436791, 1019179, 1126461, 3057537, 7134253, 21402759]

約数ペア:

[(1, 21402759), (3, 7134253), (7, 3057537), (19, 1126461), (21, 1019179), (49, 436791), (57, 375487), (79, 270921), (97, 220647), (133, 160923), (147, 145597), (237, 90307), (291, 73549), (399, 53641), (553, 38703), (679, 31521), (931, 22989), (1501, 14259), (1659, 12901), (1843, 11613), (2037, 10507), (2793, 7663), (3871, 5529), (4503, 4753)]