81521559

素因数分解:

$3^4\times 7^1\times {\mathrm{61}}^1\times {\mathrm{2357}}^1$

素因数の和:2437

約数の個数: 40

約数和(自身を含む): 141517728

約数和(自身を除く): 59996169

約数列:

[1, 3, 7, 9, 21, 27, 61, 63, 81, 183, 189, 427, 549, 567, 1281, 1647, 2357, 3843, 4941, 7071, 11529, 16499, 21213, 34587, 49497, 63639, 143777, 148491, 190917, 431331, 445473, 1006439, 1293993, 1336419, 3019317, 3881979, 9057951, 11645937, 27173853, 81521559]

約数ペア:

[(1, 81521559), (3, 27173853), (7, 11645937), (9, 9057951), (21, 3881979), (27, 3019317), (61, 1336419), (63, 1293993), (81, 1006439), (183, 445473), (189, 431331), (427, 190917), (549, 148491), (567, 143777), (1281, 63639), (1647, 49497), (2357, 34587), (3843, 21213), (4941, 16499), (7071, 11529)]