81551990

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{137}}^1\times {\mathrm{241}}^1$

素因数の和:417

約数の個数: 64

約数和(自身を含む): 168315840

約数和(自身を除く): 86763850

約数列:

[1, 2, 5, 10, 13, 19, 26, 38, 65, 95, 130, 137, 190, 241, 247, 274, 482, 494, 685, 1205, 1235, 1370, 1781, 2410, 2470, 2603, 3133, 3562, 4579, 5206, 6266, 8905, 9158, 13015, 15665, 17810, 22895, 26030, 31330, 33017, 33839, 45790, 59527, 66034, 67678, 119054, 165085, 169195, 297635, 330170, 338390, 429221, 595270, 627323, 858442, 1254646, 2146105, 3136615, 4292210, 6273230, 8155199, 16310398, 40775995, 81551990]

約数ペア:

[(1, 81551990), (2, 40775995), (5, 16310398), (10, 8155199), (13, 6273230), (19, 4292210), (26, 3136615), (38, 2146105), (65, 1254646), (95, 858442), (130, 627323), (137, 595270), (190, 429221), (241, 338390), (247, 330170), (274, 297635), (482, 169195), (494, 165085), (685, 119054), (1205, 67678), (1235, 66034), (1370, 59527), (1781, 45790), (2410, 33839), (2470, 33017), (2603, 31330), (3133, 26030), (3562, 22895), (4579, 17810), (5206, 15665), (6266, 13015), (8905, 9158)]