19888701

素因数分解:

$3^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{137}}^1\times {\mathrm{223}}^1$

素因数の和:401

約数の個数: 32

約数和(自身を含む): 31653888

約数和(自身を除く): 11765187

約数列:

[1, 3, 7, 21, 31, 93, 137, 217, 223, 411, 651, 669, 959, 1561, 2877, 4247, 4683, 6913, 12741, 20739, 29729, 30551, 48391, 89187, 91653, 145173, 213857, 641571, 947081, 2841243, 6629567, 19888701]

約数ペア:

[(1, 19888701), (3, 6629567), (7, 2841243), (21, 947081), (31, 641571), (93, 213857), (137, 145173), (217, 91653), (223, 89187), (411, 48391), (651, 30551), (669, 29729), (959, 20739), (1561, 12741), (2877, 6913), (4247, 4683)]