21236187

素因数分解:

$3^1\times 7^1\times {\mathrm{37}}^1\times {\mathrm{151}}^1\times {\mathrm{181}}^1$

素因数の和:379

約数の個数: 32

約数和(自身を含む): 33639424

約数和(自身を除く): 12403237

約数列:

[1, 3, 7, 21, 37, 111, 151, 181, 259, 453, 543, 777, 1057, 1267, 3171, 3801, 5587, 6697, 16761, 20091, 27331, 39109, 46879, 81993, 117327, 140637, 191317, 573951, 1011247, 3033741, 7078729, 21236187]

約数ペア:

[(1, 21236187), (3, 7078729), (7, 3033741), (21, 1011247), (37, 573951), (111, 191317), (151, 140637), (181, 117327), (259, 81993), (453, 46879), (543, 39109), (777, 27331), (1057, 20091), (1267, 16761), (3171, 6697), (3801, 5587)]