20884149

素因数分解:

$3^5\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{601}}^1$

素因数の和:640

約数の個数: 48

約数和(自身を含む): 36813504

約数和(自身を除く): 15929355

約数列:

[1, 3, 9, 11, 13, 27, 33, 39, 81, 99, 117, 143, 243, 297, 351, 429, 601, 891, 1053, 1287, 1803, 2673, 3159, 3861, 5409, 6611, 7813, 11583, 16227, 19833, 23439, 34749, 48681, 59499, 70317, 85943, 146043, 178497, 210951, 257829, 535491, 632853, 773487, 1606473, 1898559, 2320461, 6961383, 20884149]

約数ペア:

[(1, 20884149), (3, 6961383), (9, 2320461), (11, 1898559), (13, 1606473), (27, 773487), (33, 632853), (39, 535491), (81, 257829), (99, 210951), (117, 178497), (143, 146043), (243, 85943), (297, 70317), (351, 59499), (429, 48681), (601, 34749), (891, 23439), (1053, 19833), (1287, 16227), (1803, 11583), (2673, 7813), (3159, 6611), (3861, 5409)]