19980465

素因数分解:

$3^1\times 5^1\times {\mathrm{71}}^1\times {\mathrm{73}}^1\times {\mathrm{257}}^1$

素因数の和:409

約数の個数: 32

約数和(自身を含む): 32990976

約数和(自身を除く): 13010511

約数列:

[1, 3, 5, 15, 71, 73, 213, 219, 257, 355, 365, 771, 1065, 1095, 1285, 3855, 5183, 15549, 18247, 18761, 25915, 54741, 56283, 77745, 91235, 93805, 273705, 281415, 1332031, 3996093, 6660155, 19980465]

約数ペア:

[(1, 19980465), (3, 6660155), (5, 3996093), (15, 1332031), (71, 281415), (73, 273705), (213, 93805), (219, 91235), (257, 77745), (355, 56283), (365, 54741), (771, 25915), (1065, 18761), (1095, 18247), (1285, 15549), (3855, 5183)]