321445840

素因数分解:

$2^4\times 5^1\times {\mathrm{137}}^1\times {\mathrm{139}}^1\times {\mathrm{211}}^1$

素因数の和:500

約数の個数: 80

約数和(自身を含む): 761826240

約数和(自身を除く): 440380400

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 137, 139, 211, 274, 278, 422, 548, 556, 685, 695, 844, 1055, 1096, 1112, 1370, 1390, 1688, 2110, 2192, 2224, 2740, 2780, 3376, 4220, 5480, 5560, 8440, 10960, 11120, 16880, 19043, 28907, 29329, 38086, 57814, 58658, 76172, 95215, 115628, 117316, 144535, 146645, 152344, 190430, 231256, 234632, 289070, 293290, 304688, 380860, 462512, 469264, 578140, 586580, 761720, 1156280, 1173160, 1523440, 2312560, 2346320, 4018073, 8036146, 16072292, 20090365, 32144584, 40180730, 64289168, 80361460, 160722920, 321445840]

約数ペア:

[(1, 321445840), (2, 160722920), (4, 80361460), (5, 64289168), (8, 40180730), (10, 32144584), (16, 20090365), (20, 16072292), (40, 8036146), (80, 4018073), (137, 2346320), (139, 2312560), (211, 1523440), (274, 1173160), (278, 1156280), (422, 761720), (548, 586580), (556, 578140), (685, 469264), (695, 462512), (844, 380860), (1055, 304688), (1096, 293290), (1112, 289070), (1370, 234632), (1390, 231256), (1688, 190430), (2110, 152344), (2192, 146645), (2224, 144535), (2740, 117316), (2780, 115628), (3376, 95215), (4220, 76172), (5480, 58658), (5560, 57814), (8440, 38086), (10960, 29329), (11120, 28907), (16880, 19043)]