81821313

素因数分解:

$3^3\times 7^1\times {\mathrm{47}}^1\times {\mathrm{61}}^1\times {\mathrm{151}}^1$

素因数の和:275

約数の個数: 64

約数和(自身を含む): 144752640

約数和(自身を除く): 62931327

約数列:

[1, 3, 7, 9, 21, 27, 47, 61, 63, 141, 151, 183, 189, 329, 423, 427, 453, 549, 987, 1057, 1269, 1281, 1359, 1647, 2867, 2961, 3171, 3843, 4077, 7097, 8601, 8883, 9211, 9513, 11529, 20069, 21291, 25803, 27633, 28539, 49679, 60207, 63873, 64477, 77409, 82899, 149037, 180621, 191619, 193431, 248697, 432917, 447111, 541863, 580293, 1298751, 1341333, 1740879, 3030419, 3896253, 9091257, 11688759, 27273771, 81821313]

約数ペア:

[(1, 81821313), (3, 27273771), (7, 11688759), (9, 9091257), (21, 3896253), (27, 3030419), (47, 1740879), (61, 1341333), (63, 1298751), (141, 580293), (151, 541863), (183, 447111), (189, 432917), (329, 248697), (423, 193431), (427, 191619), (453, 180621), (549, 149037), (987, 82899), (1057, 77409), (1269, 64477), (1281, 63873), (1359, 60207), (1647, 49679), (2867, 28539), (2961, 27633), (3171, 25803), (3843, 21291), (4077, 20069), (7097, 11529), (8601, 9513), (8883, 9211)]