81491475

素因数分解:

$3^1\times 5^2\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{53}}^1\times {\mathrm{83}}^1$

素因数の和:181

約数の個数: 96

約数和(自身を含む): 157489920

約数和(自身を除く): 75998445

約数列:

[1, 3, 5, 13, 15, 19, 25, 39, 53, 57, 65, 75, 83, 95, 159, 195, 247, 249, 265, 285, 325, 415, 475, 689, 741, 795, 975, 1007, 1079, 1235, 1245, 1325, 1425, 1577, 2067, 2075, 3021, 3237, 3445, 3705, 3975, 4399, 4731, 5035, 5395, 6175, 6225, 7885, 10335, 13091, 13197, 15105, 16185, 17225, 18525, 20501, 21995, 23655, 25175, 26975, 39273, 39425, 51675, 57187, 61503, 65455, 65985, 75525, 80925, 83581, 102505, 109975, 118275, 171561, 196365, 250743, 285935, 307515, 327275, 329925, 417905, 512525, 857805, 981825, 1086553, 1253715, 1429675, 1537575, 2089525, 3259659, 4289025, 5432765, 6268575, 16298295, 27163825, 81491475]

約数ペア:

[(1, 81491475), (3, 27163825), (5, 16298295), (13, 6268575), (15, 5432765), (19, 4289025), (25, 3259659), (39, 2089525), (53, 1537575), (57, 1429675), (65, 1253715), (75, 1086553), (83, 981825), (95, 857805), (159, 512525), (195, 417905), (247, 329925), (249, 327275), (265, 307515), (285, 285935), (325, 250743), (415, 196365), (475, 171561), (689, 118275), (741, 109975), (795, 102505), (975, 83581), (1007, 80925), (1079, 75525), (1235, 65985), (1245, 65455), (1325, 61503), (1425, 57187), (1577, 51675), (2067, 39425), (2075, 39273), (3021, 26975), (3237, 25175), (3445, 23655), (3705, 21995), (3975, 20501), (4399, 18525), (4731, 17225), (5035, 16185), (5395, 15105), (6175, 13197), (6225, 13091), (7885, 10335)]