81439220

素因数分解:

$2^2\times 5^1\times {\mathrm{37}}^1\times {\mathrm{167}}^1\times {\mathrm{659}}^1$

素因数の和:872

約数の個数: 48

約数和(自身を含む): 176964480

約数和(自身を除く): 95525260

約数列:

[1, 2, 4, 5, 10, 20, 37, 74, 148, 167, 185, 334, 370, 659, 668, 740, 835, 1318, 1670, 2636, 3295, 3340, 6179, 6590, 12358, 13180, 24383, 24716, 30895, 48766, 61790, 97532, 110053, 121915, 123580, 220106, 243830, 440212, 487660, 550265, 1100530, 2201060, 4071961, 8143922, 16287844, 20359805, 40719610, 81439220]

約数ペア:

[(1, 81439220), (2, 40719610), (4, 20359805), (5, 16287844), (10, 8143922), (20, 4071961), (37, 2201060), (74, 1100530), (148, 550265), (167, 487660), (185, 440212), (334, 243830), (370, 220106), (659, 123580), (668, 121915), (740, 110053), (835, 97532), (1318, 61790), (1670, 48766), (2636, 30895), (3295, 24716), (3340, 24383), (6179, 13180), (6590, 12358)]