64345880

素因数分解:

$2^3\times 5^1\times {\mathrm{71}}^1\times {\mathrm{139}}^1\times {\mathrm{163}}^1$

素因数の和:384

約数の個数: 64

約数和(自身を含む): 148780800

約数和(自身を除く): 84434920

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 71, 139, 142, 163, 278, 284, 326, 355, 556, 568, 652, 695, 710, 815, 1112, 1304, 1390, 1420, 1630, 2780, 2840, 3260, 5560, 6520, 9869, 11573, 19738, 22657, 23146, 39476, 45314, 46292, 49345, 57865, 78952, 90628, 92584, 98690, 113285, 115730, 181256, 197380, 226570, 231460, 394760, 453140, 462920, 906280, 1608647, 3217294, 6434588, 8043235, 12869176, 16086470, 32172940, 64345880]

約数ペア:

[(1, 64345880), (2, 32172940), (4, 16086470), (5, 12869176), (8, 8043235), (10, 6434588), (20, 3217294), (40, 1608647), (71, 906280), (139, 462920), (142, 453140), (163, 394760), (278, 231460), (284, 226570), (326, 197380), (355, 181256), (556, 115730), (568, 113285), (652, 98690), (695, 92584), (710, 90628), (815, 78952), (1112, 57865), (1304, 49345), (1390, 46292), (1420, 45314), (1630, 39476), (2780, 23146), (2840, 22657), (3260, 19738), (5560, 11573), (6520, 9869)]