21008637

素因数分解:

$3^2\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{37}}^1\times {\mathrm{211}}^1$

素因数の和:290

約数の個数: 48

約数和(自身を含む): 35188608

約数和(自身を除く): 14179971

約数列:

[1, 3, 9, 13, 23, 37, 39, 69, 111, 117, 207, 211, 299, 333, 481, 633, 851, 897, 1443, 1899, 2553, 2691, 2743, 4329, 4853, 7659, 7807, 8229, 11063, 14559, 23421, 24687, 33189, 43677, 63089, 70263, 99567, 101491, 179561, 189267, 304473, 538683, 567801, 913419, 1616049, 2334293, 7002879, 21008637]

約数ペア:

[(1, 21008637), (3, 7002879), (9, 2334293), (13, 1616049), (23, 913419), (37, 567801), (39, 538683), (69, 304473), (111, 189267), (117, 179561), (207, 101491), (211, 99567), (299, 70263), (333, 63089), (481, 43677), (633, 33189), (851, 24687), (897, 23421), (1443, 14559), (1899, 11063), (2553, 8229), (2691, 7807), (2743, 7659), (4329, 4853)]