78020404

素因数分解:

$2^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{43}}^2\times {\mathrm{137}}^1$

素因数の和:245

約数の個数: 72

約数和(自身を含む): 175549248

約数和(自身を除く): 97528844

約数列:

[1, 2, 4, 7, 11, 14, 22, 28, 43, 44, 77, 86, 137, 154, 172, 274, 301, 308, 473, 548, 602, 946, 959, 1204, 1507, 1849, 1892, 1918, 3014, 3311, 3698, 3836, 5891, 6028, 6622, 7396, 10549, 11782, 12943, 13244, 20339, 21098, 23564, 25886, 40678, 41237, 42196, 51772, 64801, 81356, 82474, 129602, 142373, 164948, 253313, 259204, 284746, 453607, 506626, 569492, 907214, 1013252, 1773191, 1814428, 2786443, 3546382, 5572886, 7092764, 11145772, 19505101, 39010202, 78020404]

約数ペア:

[(1, 78020404), (2, 39010202), (4, 19505101), (7, 11145772), (11, 7092764), (14, 5572886), (22, 3546382), (28, 2786443), (43, 1814428), (44, 1773191), (77, 1013252), (86, 907214), (137, 569492), (154, 506626), (172, 453607), (274, 284746), (301, 259204), (308, 253313), (473, 164948), (548, 142373), (602, 129602), (946, 82474), (959, 81356), (1204, 64801), (1507, 51772), (1849, 42196), (1892, 41237), (1918, 40678), (3014, 25886), (3311, 23564), (3698, 21098), (3836, 20339), (5891, 13244), (6028, 12943), (6622, 11782), (7396, 10549)]