128868920

素因数分解:

$2^3\times 5^1\times {\mathrm{1091}}^1\times {\mathrm{2953}}^1$

素因数の和:4055

約数の個数: 32

約数和(自身を含む): 290319120

約数和(自身を除く): 161450200

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 1091, 2182, 2953, 4364, 5455, 5906, 8728, 10910, 11812, 14765, 21820, 23624, 29530, 43640, 59060, 118120, 3221723, 6443446, 12886892, 16108615, 25773784, 32217230, 64434460, 128868920]

約数ペア:

[(1, 128868920), (2, 64434460), (4, 32217230), (5, 25773784), (8, 16108615), (10, 12886892), (20, 6443446), (40, 3221723), (1091, 118120), (2182, 59060), (2953, 43640), (4364, 29530), (5455, 23624), (5906, 21820), (8728, 14765), (10910, 11812)]