20489961

素因数分解:

$3^1\times {\mathrm{19}}^1\times {\mathrm{61}}^1\times {\mathrm{71}}^1\times {\mathrm{83}}^1$

素因数の和:237

約数の個数: 32

約数和(自身を含む): 29998080

約数和(自身を除く): 9508119

約数列:

[1, 3, 19, 57, 61, 71, 83, 183, 213, 249, 1159, 1349, 1577, 3477, 4047, 4331, 4731, 5063, 5893, 12993, 15189, 17679, 82289, 96197, 111967, 246867, 288591, 335901, 359473, 1078419, 6829987, 20489961]

約数ペア:

[(1, 20489961), (3, 6829987), (19, 1078419), (57, 359473), (61, 335901), (71, 288591), (83, 246867), (183, 111967), (213, 96197), (249, 82289), (1159, 17679), (1349, 15189), (1577, 12993), (3477, 5893), (4047, 5063), (4331, 4731)]