81391725

素因数分解:

$3^2\times 5^2\times {\mathrm{19}}^1\times {\mathrm{79}}^1\times {\mathrm{241}}^1$

素因数の和:355

約数の個数: 72

約数和(自身を含む): 156041600

約数和(自身を除く): 74649875

約数列:

[1, 3, 5, 9, 15, 19, 25, 45, 57, 75, 79, 95, 171, 225, 237, 241, 285, 395, 475, 711, 723, 855, 1185, 1205, 1425, 1501, 1975, 2169, 3555, 3615, 4275, 4503, 4579, 5925, 6025, 7505, 10845, 13509, 13737, 17775, 18075, 19039, 22515, 22895, 37525, 41211, 54225, 57117, 67545, 68685, 95195, 112575, 114475, 171351, 206055, 285585, 337725, 343425, 361741, 475975, 856755, 1030275, 1085223, 1427925, 1808705, 3255669, 4283775, 5426115, 9043525, 16278345, 27130575, 81391725]

約数ペア:

[(1, 81391725), (3, 27130575), (5, 16278345), (9, 9043525), (15, 5426115), (19, 4283775), (25, 3255669), (45, 1808705), (57, 1427925), (75, 1085223), (79, 1030275), (95, 856755), (171, 475975), (225, 361741), (237, 343425), (241, 337725), (285, 285585), (395, 206055), (475, 171351), (711, 114475), (723, 112575), (855, 95195), (1185, 68685), (1205, 67545), (1425, 57117), (1501, 54225), (1975, 41211), (2169, 37525), (3555, 22895), (3615, 22515), (4275, 19039), (4503, 18075), (4579, 17775), (5925, 13737), (6025, 13509), (7505, 10845)]