64803020

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{127}}^1\times {\mathrm{823}}^1$

素因数の和:990

約数の個数: 48

約数和(自身を含む): 141754368

約数和(自身を除く): 76951348

約数列:

[1, 2, 4, 5, 10, 20, 31, 62, 124, 127, 155, 254, 310, 508, 620, 635, 823, 1270, 1646, 2540, 3292, 3937, 4115, 7874, 8230, 15748, 16460, 19685, 25513, 39370, 51026, 78740, 102052, 104521, 127565, 209042, 255130, 418084, 510260, 522605, 1045210, 2090420, 3240151, 6480302, 12960604, 16200755, 32401510, 64803020]

約数ペア:

[(1, 64803020), (2, 32401510), (4, 16200755), (5, 12960604), (10, 6480302), (20, 3240151), (31, 2090420), (62, 1045210), (124, 522605), (127, 510260), (155, 418084), (254, 255130), (310, 209042), (508, 127565), (620, 104521), (635, 102052), (823, 78740), (1270, 51026), (1646, 39370), (2540, 25513), (3292, 19685), (3937, 16460), (4115, 15748), (7874, 8230)]