639856816

素因数分解:

$2^4\times {\mathrm{61}}^1\times {\mathrm{101}}^1\times {\mathrm{6491}}^1$

素因数の和:6661

約数の個数: 40

約数和(自身を含む): 1272717648

約数和(自身を除く): 632860832

約数列:

[1, 2, 4, 8, 16, 61, 101, 122, 202, 244, 404, 488, 808, 976, 1616, 6161, 6491, 12322, 12982, 24644, 25964, 49288, 51928, 98576, 103856, 395951, 655591, 791902, 1311182, 1583804, 2622364, 3167608, 5244728, 6335216, 10489456, 39991051, 79982102, 159964204, 319928408, 639856816]

約数ペア:

[(1, 639856816), (2, 319928408), (4, 159964204), (8, 79982102), (16, 39991051), (61, 10489456), (101, 6335216), (122, 5244728), (202, 3167608), (244, 2622364), (404, 1583804), (488, 1311182), (808, 791902), (976, 655591), (1616, 395951), (6161, 103856), (6491, 98576), (12322, 51928), (12982, 49288), (24644, 25964)]