66855640

素因数分解:

$2^3\times 5^1\times {\mathrm{419}}^1\times {\mathrm{3989}}^1$

素因数の和:4419

約数の個数: 32

約数和(自身を含む): 150822000

約数和(自身を除く): 83966360

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 419, 838, 1676, 2095, 3352, 3989, 4190, 7978, 8380, 15956, 16760, 19945, 31912, 39890, 79780, 159560, 1671391, 3342782, 6685564, 8356955, 13371128, 16713910, 33427820, 66855640]

約数ペア:

[(1, 66855640), (2, 33427820), (4, 16713910), (5, 13371128), (8, 8356955), (10, 6685564), (20, 3342782), (40, 1671391), (419, 159560), (838, 79780), (1676, 39890), (2095, 31912), (3352, 19945), (3989, 16760), (4190, 15956), (7978, 8380)]