28945360

素因数分解:

$2^4\times 5^1\times {\mathrm{19}}^1\times {\mathrm{137}}^1\times {\mathrm{139}}^1$

素因数の和:308

約数の個数: 80

約数和(自身を含む): 71870400

約数和(自身を除く): 42925040

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 38, 40, 76, 80, 95, 137, 139, 152, 190, 274, 278, 304, 380, 548, 556, 685, 695, 760, 1096, 1112, 1370, 1390, 1520, 2192, 2224, 2603, 2641, 2740, 2780, 5206, 5282, 5480, 5560, 10412, 10564, 10960, 11120, 13015, 13205, 19043, 20824, 21128, 26030, 26410, 38086, 41648, 42256, 52060, 52820, 76172, 95215, 104120, 105640, 152344, 190430, 208240, 211280, 304688, 361817, 380860, 723634, 761720, 1447268, 1523440, 1809085, 2894536, 3618170, 5789072, 7236340, 14472680, 28945360]

約数ペア:

[(1, 28945360), (2, 14472680), (4, 7236340), (5, 5789072), (8, 3618170), (10, 2894536), (16, 1809085), (19, 1523440), (20, 1447268), (38, 761720), (40, 723634), (76, 380860), (80, 361817), (95, 304688), (137, 211280), (139, 208240), (152, 190430), (190, 152344), (274, 105640), (278, 104120), (304, 95215), (380, 76172), (548, 52820), (556, 52060), (685, 42256), (695, 41648), (760, 38086), (1096, 26410), (1112, 26030), (1370, 21128), (1390, 20824), (1520, 19043), (2192, 13205), (2224, 13015), (2603, 11120), (2641, 10960), (2740, 10564), (2780, 10412), (5206, 5560), (5282, 5480)]