20974737

素因数分解:

$3^1\times 7^1\times {\mathrm{47}}^1\times {\mathrm{79}}^1\times {\mathrm{269}}^1$

素因数の和:405

約数の個数: 32

約数和(自身を含む): 33177600

約数和(自身を除く): 12202863

約数列:

[1, 3, 7, 21, 47, 79, 141, 237, 269, 329, 553, 807, 987, 1659, 1883, 3713, 5649, 11139, 12643, 21251, 25991, 37929, 63753, 77973, 88501, 148757, 265503, 446271, 998797, 2996391, 6991579, 20974737]

約数ペア:

[(1, 20974737), (3, 6991579), (7, 2996391), (21, 998797), (47, 446271), (79, 265503), (141, 148757), (237, 88501), (269, 77973), (329, 63753), (553, 37929), (807, 25991), (987, 21251), (1659, 12643), (1883, 11139), (3713, 5649)]