211803921

素因数分解:

$3^2\times 7^2\times {\mathrm{331}}^1\times {\mathrm{1451}}^1$

素因数の和:1802

約数の個数: 36

約数和(自身を含む): 357209424

約数和(自身を除く): 145405503

約数列:

[1, 3, 7, 9, 21, 49, 63, 147, 331, 441, 993, 1451, 2317, 2979, 4353, 6951, 10157, 13059, 16219, 20853, 30471, 48657, 71099, 91413, 145971, 213297, 480281, 639891, 1440843, 3361967, 4322529, 10085901, 23533769, 30257703, 70601307, 211803921]

約数ペア:

[(1, 211803921), (3, 70601307), (7, 30257703), (9, 23533769), (21, 10085901), (49, 4322529), (63, 3361967), (147, 1440843), (331, 639891), (441, 480281), (993, 213297), (1451, 145971), (2317, 91413), (2979, 71099), (4353, 48657), (6951, 30471), (10157, 20853), (13059, 16219)]