20966985

素因数分解:

$3^3\times 5^1\times {\mathrm{13}}^2\times {\mathrm{919}}^1$

素因数の和:959

約数の個数: 48

約数和(自身を含む): 40406400

約数和(自身を除く): 19439415

約数列:

[1, 3, 5, 9, 13, 15, 27, 39, 45, 65, 117, 135, 169, 195, 351, 507, 585, 845, 919, 1521, 1755, 2535, 2757, 4563, 4595, 7605, 8271, 11947, 13785, 22815, 24813, 35841, 41355, 59735, 107523, 124065, 155311, 179205, 322569, 465933, 537615, 776555, 1397799, 1612845, 2329665, 4193397, 6988995, 20966985]

約数ペア:

[(1, 20966985), (3, 6988995), (5, 4193397), (9, 2329665), (13, 1612845), (15, 1397799), (27, 776555), (39, 537615), (45, 465933), (65, 322569), (117, 179205), (135, 155311), (169, 124065), (195, 107523), (351, 59735), (507, 41355), (585, 35841), (845, 24813), (919, 22815), (1521, 13785), (1755, 11947), (2535, 8271), (2757, 7605), (4563, 4595)]